Service Documents & Technical Publications

Official documentation, manuals and technical resources to support maintenance, operation and compliance of MT-Propeller systems.
STC/stc_pic/beech_b23-c23.jpg
Access to accurate and up-to-date documentation is essential for safe and compliant aircraft operation. Our service documents provide maintenance organizations, operators and aircraft owners with the technical information required to support MT-Propeller systems throughout their service life.

All documents are created and maintained in accordance with applicable aviation standards and are regularly reviewed to ensure accuracy and regulatory compliance.
0
List of Service Bulletins
10.06.2026
1R12
TBO von Verstellpropellern MTV

TBO of variable pitch propellers MTV
10.06.2026
1-1R5
TBO for Hovercraft Applications
19.09.2025
2A
Fliehgewichte MTV-2-( )

Counterweights MTV-2-( )
02.02.1987
3
Steuergerät P-120-A (LTA # 89-108)

Control Unit P-120-A (Germany AD)
22.03.1989
4A
Ankerschrauben in MTV-1 und MTV-6-C (LTA # 90-214/2)

Lag Screws in MTV-1 and MTV-6-C (German AD)
08.04.1993
5
Ankerschrauben in MTV/MTE Propellern

Lag Screws in MTV/MTE propellers
24.01.1991
6
Notverfahren für elektr. Verstellpropeller (LTA # 92-367)

Emergency Procedures for electrically variable pitch propellers (German AD)
15.10.1992
7A
Stellmotoren - Austausch (LTA # 93-088/2)

Replacement of the electric pitch change motors (German AD)
06.10.1995
8B
Genauere Vorflugkontrolle für MT ( ) ( ) ( ) - ( ) und MTV-( ) (EASA AD No. 2006-0345)

More precise preflight inspection for MT ( ) ( ) ( ) - ( ) und MTV-( ) (EASA AD No. 2006-0345)
08.03.2006
9
Befestigung (Anzugsmomente) und Überprüfung der Installation für Holz-Composite Festpropeller

Inspection of installation and torque of mounting bolts for fixed pitch wood composite propellers
15.11.1994
10A
Installationsliste für Holz-Composite Festpropeller zugelassen in Frankreich

Installationlist for fixed pitch propellers certified in France

(Cancelled!)
10.06.2003
11F
Installationsliste für MT-Verstellpropeller zugelassen in Frankreich

Installation list for MT variable pitch propellers certified in France
(Cancelled!)
18.06.2003
12D
Propellernabe, Rißprüfung und Nachbearbeitung oder Ersatz der Nabe von MTV-3-B-C mit L250-21 Blättern an M-14-P/M-14-PF Motoren (LTA # 97-006/5)

Propellerhub, crack inspection and rework or replacement of the hub MTV-3-B-C with blades L250-21 at engines M-14-P/M-14-PF (German AD)
08.12.1998
13R6
Liste der möglichen Spinner an MT-Propellern

List of possible spinner assys for MT-propellers
08.04.2026
14R10
Liste der möglichen Regler für MT-Propeller

List of possible governors for MT-Propellers
09.05.2023
15R5
Mögliche Enteisungssysteme an MT-Propellern

Possible de-ice systems for MT-propellers
27.10.2021
16R1
Liste der Propeller-Installationen, für die ein Nachweis nach JAR-P-60(b), 160(b), 190 und 220 erbracht ist

List of MT-Propeller installations, which are in compliance with JAR-P-60(b), 160(b), 190 and 220
12.10.2021
17A
Propellerblätter, Prüfung des Anzugsmonents und gegebenenfalls Ersatz der Blattwurzel-Ankerschrauben bei MTV-3-B-C/L250-21, MTV-9-B-C/CL260-27 oder CL250-27 (LTA 1999-081/2, 1999-082/2)

Propeller blades, inspection of the torque and if applicable, replacement of the blade root lag screws of MTV-3-B-C/L250-21, MTV-9-B-C/CL260-27 or CL250-27 (German AD)
05.03.1999
18
MTV-25-1-D-C-R(M)/CR165-06 Austausch von Federn für Luftschiff Anwendung

MTV-25-1-D-C-R(M)/CR165-06 Replacement of springs for Airship Application
26.07.2000
19
Neue Steuergeräte P-120-A: Veränderte Bedienelemente und Bedienung

New electric control units P-120-A: Modified control elements and operational procedures.
28.02.2003
20
Inspektion der Ankerschrauben, die zur Produktion bis 1989 verwendet wurden

Inspection of lag screws, which were used for production until the year 1989
26.01.2004
21A
Nachziehen der Blattvorspannung Alle Halter / Betreiber von Flugzeugen MT-Verstellpropeller MTV-9-B-S installiert auf einem SMA SR 305-230 Motor

Retorque of blade preload nut All owners / operators of aircrafts using the variable pitch propeller MTV-9-B-S installed on engine SMA SR 305-230
22.08.2012
22
Compatibility of MT-Propeller Governors P-980-16 (28 VDC System) or P-980-11 (14 VDC System) according to MT-Propeller Service Bulletin 14 (latest issue)
13.03.2007
23R1
Mounting torque of 9/16 inches-18 UNF stop nuts
18.10.2021
24
PU Tape removal on CRLD193-109 and CRLD118-119a propeller blades
09.01.2008
25
MT-Propeller –B Flange installation Hardware Inspection on Lycoming Engines using SAE No. 2 mod ½” bolts and nuts of Part No. C-060 and C-061 and installed between Januar 2008 and July 2009 during manufacturing and/or Overhaul.
30.04.2010
26R5
De-Ice Wiring on MTV-27-1 Propeller series with Dual-Element De-Icing Boots (3 wires). Length of the Spinner Fixture Screws MTV-27-1 Propeller series equiooed with dual-elements boots.
23.11.2015
27
MT-Propeller Governors Inspection and Upgrade for Governor Models manufactured from May 2012 till Jan 2013 or Overhauled / Repaired with a new governor base from May 2012 till Jan 2013
20.02.2013
28
Installation of a Strake on TBM 700/850 series aircraft
10.06.2014
29R2
Splitted Retaining Ring Position Inspection which holds the blade in the Propeller hub. Affected propellers: MTV-33-1-A and MTV-34-1-A ,manufactured before June 2014
08.03.2017
30R9
Alert Service Bulletin:

Replacement of Blade Lag Screw of a certain production lot.

Affected propellers:

a) MTV-5-(), MTV-9-(), MTV-11-(), MTV-12-(), MTV-14-(), MTV-15-(), MTV-16-(), MTV-17-(), MTV-18-(), MTV-20-(), MTV-23-(), MTV-27-()
manufactured from Nov 2013 until October 2014 with Lag Screw type A-983-C-85 are affected.

b) All overhauled or repaired propellers from Nov 2013 until end of October 2014 with new installed lag screws during overhaul, as applicable.
15.01.2024
31
MT-Propeller Governors Inspection and Upgrade for Governor P-8XX-3 Models defined by Serial Number Manufactured from April 2010 until July 2013.

To all Owners/Operations of MT-Propeller Governor

Affected Types:
All Governors listed by type and serial number on page 3 and 4 which were manufactred from April 2010 until July 2013 installed on direct drive engines modified with electronic ignition or higher compression pistons.
29.08.2016
32
Replacement of Pitch Change Pins of Constant Speed Propellers

Affected Propellers:
All constant speed propellers 12 years or older with noticeable corrosion on steel parts, like counterweight bodies, counterweight modules or screws
30.05.2017
33
Replacement of the Blade Bearing A-1540 during Overhaul

Affected Propeller:
MTV-9-B-S / 198-58B installed on Cessna 182/ Socata TB20 with SMA SR305-230-01 Diesel engine
29.05.2018
34R1
Leading Edge Inspection

Affected Propeller:
MTV-33-1-A /( )-( ) - TCDS EASA-P.048 MTV-34-1-A /( )-( ) - TCDS EASA P.049 , which are manufactured between 1.September 2017 until 1.June 2018.
15.11.2020
35R2
Recommended RPMS for reduced long time wear in the blade bearing. Empfohlene Drehzahl für weniger Verschliess im Blattlager.

Affected Propeller: MT-Propeller model MTV-1-A/L160-03 which is operated in combination with a Limbach L2000( ) engine in airframes H36, RF5, G109 or TAIFUN 17E but not limited to those airframes and had an engine overhaul or exchange after January 2014.

Betroffene Propeller:  MT-Propeller Modell MTV-1-A/L160-03, das in Kombination mit dem Limbach Motor L2000( ) unter anderem in den Flugzeugmodellen H36, RF5, G109 und TAIFUN 17E betrieben wird und eine Motorüberholung oder einen Motoraustausch nach Januar 2014 hatte.
 
12.08.2020
36R4
Engine Oils to be used for MT-Propellers

Affected Propeller:
All propellers using turboprop or reciprocating (also Diesel Jet A1) engines
05.05.2026
37R3
MT-Propeller Piston O-Ring replacement

Affected Propeller:
All Owners / Operators of MT-Propeller MTV-5-1-D-C-F-R(A)/( )-( ) which are installed on Allison / Rolls-Royce M250-B17( ) engine.
29.08.2024
38
MT-Propeller Hub Inspection

Affected Propellers:
All Owners / Operators of MT-Propeller MTV-27-1-E-C-F-R(G)/CFRL240-55d which are installed on Mitsubishi MU-2B-( ).
24.04.2023
39R1

Alert Service Bulletin: Replacement of the Propeller Guide Rod

Affected Propellers:
- All MTV-33-1-( ) / MTV-34-1-( ) / MTV-36-1-( ) propeller series which are manufactured before January 1,2024 and overhauled/repaired before June 6, 2025 and used as ground adjustable propeller systems, in operation without hydraulic governor.
18.06.2025
40
MT-Propeller green Piston O-Ring and Piston Backup Ring Replacement

Affected Propellers:
All Owners / Operators of MT propeller models MTV-5 / -16 / -27 / -37 / -47 installed on turbine engines from Pratt & Whitney, Honeywell, Rolls Royce and GE Aviation.
09.04.2024
41R1
MT-Propeller Turbo-Prop Piston O-Ring Replacement

Affected Propellers:
All Owners / Operators of MT propeller models MTV-5 / -16 / -27 / -37 / -47 installed on turbine engines from Pratt & Whitney, Honeywell, Rolls Royce and GE Aviation.
15.01.2026
0
List of Service Letter
 
13.07.2026
1
Replacing of lag screws part No. A-550-85 and part No. A-550-65 by lag screws part No. A-983-85 and part No. A-983-65.

Affected Propellers: All Constant Speed Propellers.
12.05.1999
2
Aeroshell No. 5 is used instead of Aeroshell No. 6.

Affected Propellers: All Constant Speed Propellers.

Replaced by Service Letter No. 21
12.05.1999
3
Modification of the pitch change pin location.

Affected Propellers: All Constant Speed Propellers.
12.05.1999
4
Introduction of DF O-Rings.

Affected Propellers: All Constant Speed Propellers.

Replaced by Service Letter No. 14
12.05.1999
5
Replacing of screws part no. MS 35265-65/ A-1635-70 and washers part no. AN 960-10.

Affected Propellers: All Hydraulic Constant Speed Propellers.
12.05.1999
6A
Modification of Counterweights A-597-B.

Affected Propellers: MTV-9-B-C/CL250-27, MTV-9-B-C/CL260-27
12.05.1999
7A
Replacement of screws M3x10 by M3x12.

Affected Propellers: All Electric Constant Speed Propellers
05.03.2003
8
Obsolete
03.08.2026
9A
Replacing of blade bearings A-317, A-233, A-004

Affected Propellers: All variable pitch propellers
27.08.2001
10
Teardown inspection at 1/3 TBO.

Affected Propellers: All Variable Pitch Aerobatic Propellers.
01.03.2000
11
Installation of standard electric pitch change motor

Affected Propellers: All Electric Constant Speed Propellers.
05.04.2000
13
Painting of Counterweights

Affected Propellers: All Counterweighted Propellers
11.07.2002
14D
New blade seals in MT-Propeller constant speed propellers.

Affected Propellers: All MTV Constant Speed Propellers.
20.03.2003
15R1
New counterweights

Affected Propellers: All MT-Propellers with the new counterweights installed
30.04.2021
16
Erosion Sheath on fixed pitch propeller

Affected Propellers: All Fixed Pitch Propellers with a Diameter > 69.3 inch
01.02.2001
17C
Replacement of MTV-9/ -12/ -14/ -15 hub (serial numbers up to 97xxx).

Affected Propellers: MTV-9, MTV-12, MTV-14, MTV-15
09.03.2011
18R1
Additional Installation of PTFE back up ring

Affected Propellers: MTV-9-( ), MTV-12, MTV-14-( )
29.07.2015
19
New Control Unit P-120-A (beginning with serial no. WA01-XXX)

Affected Propellers: All aeroplanes and motor gliders with an electrical variable pitch MT-Propeller with a Control Unit P-120-A
21.10.2001
20A
Replacement of the front plate of MTV-9-/MTV-12-/MTV-14-/MTV-16-( ) with new hub

Affected Propellers: MTV-9/ -12/ -14/ -16, standard, with feather and reverse (M) (P).
19.02.2009
21B
Replacement of Aeroshell 5 by MT 2 Propeller Grease including improvement of viscosity
04.11.2002
22L
Obsolete
29.08.2024
23C
Grease Leakage Problem.

Affected Propellers: MTV-12-B/180-17 installed on Diamond DA40 with Lyc. IO-360-M1A.
21.03.2003
24A
Torque of Check Nuts and Slotted Nuts.

Affected Propellers: All hydraulic MTV-Propellers.
07.03.2003
25
Replacement of return spring, part no. A-085 by new return spring part no. D-389-K

Affected Propeller: MTV-6( )
28.01.2004
26A
Front Plates

Affected Propeller: All hydraulic MTV-Propeller (except dual acting Walter Reverse Systems -R(W)) manufatured between Augst 1999 up to October 2004 (serial no. 99xxx to 04xxx)
12.11.2004
27R1
Cure date and shelf live of MT-Propeller O-Rings

Affected Propeller: All hydraulic and electric constant speed MT-Propeller.
19.09.2012
28
Installation of oil cooler scoop P/N 763-8035-1/MT on Cessna U206 , TU206G (with Soloy Turbine PAC, FAA STC SA 3353 NM) equipped with 5-blade MTV-5-1-E-C-F-R(M)/CFR220-54 propeller

Affected Propeller: MTV-5-1-E-C-F-R(M)/CFR220-54
03.07.2006
29R6
Additional application of carbon fiber plies on blade tip area

Affected Propellers: MTV-15-B/210-58 and MTV-15-B/205-58 on Husky A1-( ) MTV-15-B/203-58 on ACA Scout MTV-15-C/200-50p / MTV-20-C/200-50p and MTV-15-( )/183-50 MTV-12-( )/( )180-57
27.09.2021
30D
Fluid De-Ice Boot Installation on MT-Propeller Composite Blades
18.06.2009
31A
MTV-9-B-S/198-58B Rework and Modification of Blade Preload-Nut A-1368 and Blade Ferrule A-1367
12.02.2008
32R6
MT-, MTE and MTV-Propellers with natural Composite Blades
In-Field-Repairs
08.03.2024
32-1
MT-, MTE and MTV-Propellers with natural Composite Blades
Painting
11.11.2013
32-2R1
Performance of Minor Infield Repairs of the Natural Composite MT-Propeller Blades During the Operation Time between Overhaul Periods
08.03.2024
33A
Shrouded Propeller Installation (if not enough clearance between blade tip and shroud)
20.01.2009
34
MTV-9-B-S/198-58B installed on Cessna 182 (SMA-Application) with Propeller hub A-926-2-( )
20.10.2009
34-1
MTV-6-( )-( )with Fluid Deice Systemn MTV-6-( )-( )-( ) propeller hub: A-900-I / A-1677
22.05.2017
35A
All MT-Constant Speed Propellers
Cleaning of Parts and Hubs by Glass / Plastic Media Blasting
13.03.2009
36
Rework of Hub Inserts to Newest Technical Standard during next Overhaul and/or Repair
MTV-16-1-N-C-F-R(P)
MTV-27-1-N-C-F-R(P)
MTV-27-2-N-C-F-R(P)
07.05.2009
37A
Propeller Governors for Electric Control P-857 / P-877 series
Correct Adjustment of Travel of Speed Change Nut
02.12.2011
38R2
Procedure for the Installation of the Preload System P-890

Affected Propeller: MTV-12, MTV-14, MTV-22
09.09.2014
39
Start Lock Springs
Exchange of Start Lock Springs, Identification of Springs
(for special customer only)
07.10.2009
40
Propeller Governors for Electric Control P-853, P-877 series
Installation of the Flexible Max Speed Stop Modification “D”
(for special customer only)
10.11.2009
41R1
Optional Replacement of Return Spring Part N. A-880 by new Return Spring Part No. A-1772 and A-1771-1

Affected Propeller: MTV-12-( )-C-F
23.06.2015
42
Propeller Designation System
21.03.2010
43
Cure Date and Shelf Life of MT-2 Propeller Grease
09.05.2011
44R1
Length of stainless-steel erosion protection sheaths for single blades
24.05.2020
45R2
(for MT-Propeller internal use only!)
14.12.2015
46
Fittings installed on Unfeathering Accumulator P-893-( )/P-905-( ) on all Diamond DA42 with Thielert/Austro/Lycoming engines
28.09.2012
47
Blade Seal Installation during Propeller Assembly
14.01.2013
48
i. p.
14.01.2013
49R9
Re-Positioning of de-ice cables to improve long time wear.
06.02.2018
50R2
Pitch change pin inspection during next overhaul or repair.
20.03.2023
51R1
Installation of Protective Erosion Tape on De-Ice Boots

Affected Propeller: MTV-27-1-E-C-F-R(G)/CFRL250-55b
Affected Aircraft: DO228 series
17.03.2016
51-1R4
Installation of Protective Erosion Tape on De-Ice Boots
Pilatus PC 12 / KingAir 90/200/300/350 series / Beech 1900 series SA-227-AT/-AC/-BC/-TT/-CC/-DC/ SA-226-TB / Metro 3 / Merlin 4

Affected Propeller:
MTV-27-1-E-C-F-R(P)/CFR210-58d
MTV-27-1-E-C-F-R(P)/CFR225-55f
MTV-27-1-E-C-F-R(G)/CFRL250-103
MTV-27-1-E-C-F-R(P)/CFR260-65b
MTV-27-1-(E)/(N)-C-F-R(P)/CFR260-65k
MTV-27-1-N-C-F-R(P)/CFR260-65a
MTV-47-1-N-C-F-R(P)-( )/CFR260-361
27.02.2024
52R1
Optimum Installation of the Christen 801 Series Inverted Oil System in
Combination with MT-Propellers.

Affected Propeller: MTV-12-B-C/C183-17e
Affected Aircraft: Grob G115E

For special customer only
29.05.2013
52-1R1
Installation of P-447 Accumulator in Combination with MT-Propellers

Affected Propeller: MTV-12-B-C/C183-17e
Installed per EASA STC 10043263
30.07.2015
52-2
Removal of Inner Propeller Spring on Counterweighted MT-Propeller

Affected Propeller: MTV-12-B-C/C183-17e
Installed per EASA STC 10043263
07.11.2013
53R4
Modification of Fluid Deice System

Affected Propeller:MTV-14-D/195-30b
Affected Aircraft: Cirrus SR22-( ) with Spinner Assy P-320-2
28.12.2015
54
Replacement of parts during overhaul or repair

Affected Propeller: MTV-27-1-N-C-F-R(G)-J with blade type CFR285-82 or CFRL 285-82
Affected Aircraft: Jetstream 41
25.07.2013
55R5
Installation of Protective Polyurethane Tape on MTV-5-()/-27-() Hovercraft blades

Affected Propeller:
MTV-5-1-W-C-R(H)/CRLD199-117
MTV-27-1-X-C-R(H)/CRLD218-121d
MTV-27-1-V-C-R(H)/CRLD258-121b
MTV-27-1-YZ-C-R(H)-J/CRRD350-132a
MTV-28-2-AZ-R(H)/CRRD358-160

Affected Vehicle: Griffon Hovercraft

(This service Letter overwrites 55A)
13.11.2015
56R2
General Information for MT-Propeller trained Mechanics Possible Action against Dynamic Vibration on MT-Propeller

Affected Propeller: MTV-27-( ), MTV-25-( ), MTV-16-( ), MTV-5-( )
06.11.2025
57R1
Affected Propeller: MTV-27-1-N-C-F-R(G)-J/ CFR285-82 / CFRL285-82
with spinner assembly P-1152-( )
installed on Jetstream 41
Manufactured / overhauled or repaired before 12/2013.
17.03.2015
58
Removal of inner propeller spring on counterweighted MT-Propeller

Affected Propeller: MTV-14-B-C/C190-17 on EXTRA 300 series, Cap 231/EX/232 Series
07.08.2014
59
Counterweight body crack inspection (Magnetic Particle Inspection)

Affected propeller: All counterweighted variable Pitch MT-Propeller
19.02.2015
60
Moficiation of Counterweight Body A-1496-(C )Y( )

Affected Propeller:
MTV-16-1-N-C-F-R(P)/ CFRLD265-65
MTV-16-1-N-C-F-R(P)/ CFRLD280-65
11.06.2015
61
Additional Secure of Motor Screws on Electric Motor P-820-( )
04.08.2015
62R1
Modification of the Starter Gear installed on Lycoming Engine for Electrically Controlled Variable Pitch Propeller Systems

Affected Propellers: MTV-7-( ),MTV-10-( ), MTV-18-( ), MTV-23-( )
13.09.2021
63
Inspection of Beta Valve P-846 / Prop Front O-Ring for possible Oil Leak Installed on RR250 engines

Affected Propellers:
MTV-5-1-D-C-F-R(A)/CFR210-56
02.11.2016
64
Alternative Positioning of MT-Propeller Identification Label

Affected Propellers:
All MTV-Propeller which have no identification label on the propeller blade
02.02.2017
65R1
Inner bearing Halves Inspection (Visual Inspection)

Affected Propellers:
All Hydraulically and Electrically Controlled Variable Pitch MT-Propeller As sharp edges were found on the split line of the inner bearing halves.

(For certified service stations only)
15.03.2021
66R1
Outer Blade Bearings MTV-33, MTV-34, MTV-36
20.03.2023
67
How to use the Anti Icing Liquid ICEX II (Goodrich) on MT-Propeller Blades
26.09.2017
68
Replacement of Electric Servo Motor Type 34L / 34LT / 35 NT
Installed on Electrically Controlled Variable Pitch MT - Propellers
24.08.2017
69
Readjustment of the Low Pitch Stop Rods or Replacement of the Piston Extension P/N A-1020-A-42-L installed on MTV-9-( )-( )-R(M) propeller during the next Repair or Overhaul
15.02.2018
70
Propeller Snap Ring Inspection MTV-33-( ) and MTV-34-( ) Propeller
10.09.2018
71R3
Governor jam relieve, adjustment of MIN and MAX RPM settings P-853-16 and -877-16
01.07.2020
72R3
Application of Expoxy Filler on Natural Composite Blades
06.03.2024
73R1
Optional installation of the blade bearing A-1540
20.03.2023
74
Propeller Carbon Blocks C-131-3 used for MT-Propellers installed on PT6A-( ) engines
25.02.2021
75R1
Piston exchange for MTV-47-( ) series 
13.07.2026
76
Thicker Erosion Protection Sheaths on Fixed Pitch Propellers
18.08.2021
77
Length of the spinner fixture screws installed on spinner assembly P/N P-1741-( )
17.03.2022
78
PT-6 Governor Reverse RPM-Limitation Check (Py Air-Bleed Function)

Affected Propeller: MTV-16-1-E-C-F-R(P)/CFR240-55( ) on PT6-( ) engines
02.05.2022
79R1
New PTFE Backup Rings

Affected Propeller: All MT propellers MTV-( )-R(G), -R(P), -R(A), -R(W) -R(GE), installed on Garrett / Pratt & Whitney / Allison / Walter / GE engine applications
10.04.2024
80
MT-Propeller New Piston O-ring for Turboprop Installations

Affected Propeller: All MT propellers MTV-( )-R(G), -R(P), -R(A), -R(W) -R(GE), installed on Garrett / Pratt & Whitney / Allison / Walter / GE engine applications 

OBSOLETE (replaced by Service Bulletin No. 40)
01.01.0001
81
Possible Grease Leak and High Friction of Blade Preload after or during Assembly Affected O-rings:

All blade O-rings, C-057-( )-R, all models of a certain production batch.
14.11.2022
82
Instructions for grounding of non-insulated electrically controlled governor Governor

Models affected: P-853-16, P-877-16.
29.04.2024
83R1
Alternative approved paint for paint corrections on propeller blades and domes

Affected Propeller: All MT propeller models used on Cirrus aircrafts.
30.10.2025
84
Nickel leading edges for improved erosion behavior compared to the stainless steel edge on blade type CFRLD280-65

Affected Propeller: All MT propeller models with blade model CFRLD280-65
07.05.2026
0
List of Service Instructions
22.05.2026
3
Instruction for low-pitch-stop, high-pitch-stop and full-reverse-stop adjustment on MTV-Propellers (former AAW-003a)
14.03.2000
4R15
Basic Data for Electro-Thermal De-Icer Installation on MT-PropellersBasic Data for Electro-Thermal De-Icer Installation on MT-Propellers
16.12.2025
6
Removal and Installation of Servo Motors at electrically controlled MTV-Propellers (former AAW-006)
14.03.2000
7
Installation of Clamp Type Counterweights at MTV-Propellers
14.03.2000
16
Installation of new counterweights
17.10.2000
17A
Change of minimum blade pitch on counterweighted MTV-Propellers
16.01.2006
18C
Airpressure Switch Adjustment for Propellers with Reverse Thrust Capability
12.10.2005
20 - 20-1
Drehzahlsensor und deren Tauschverfahren RPM Sensors and the Replacement Procedures
31.07.2002
22
Removal and Installation of the Stainless Steel Seal inserts in modified MTV-hubs
17.12.2001
23A
Installation of New Type of Blade Seals in Constant Speed MTV-Propellers
29.01.2004
24
Removal of Front Cover for Maintenance or Modification Purposes
21.06.2002
25B
Replacement of Servo Motors by "MT P820-()" Servo Motors
01.02.2005
27
Modification of the "Sleeve Valve Spring" installed in P-480-( ) Propeller Governors
17.07.2002
28A
Setting Maximum Blade Pitch on MT-Propellers (which use oil pressure to increase pitch)
16.01.2006
29 - 29-1
Änderung der Gewindebuchsen an einem SAE No. 2 Flansch
Bushing threads conversion on SAE No. 2 Flange type
16.01.2004
30
Adjustment of Relief Valve Pressure on P-41()-(), P-42()-() and P-44()-() Governors
26.06.2003
31
Application of Blade Bearing Grease to a MTV-25-2-D-C-R(M)/CFR170-23 *
03.11.2003
33
Entfernen des Safety Lock bei MTV-6-A-C-F für DA42
27.04.2004
34
Piston Extension Replacement MTV-6
05.07.2004
35
Piston Extension Replacement MTV-6
13.08.2004
36
Replacement of 3 counterweights on new MT-Prop
26.10.2004
37A
Bonding of self adhesive PU-Erosion strip on MT-Propellers with Metal Erosion Sheet
(replaces E-482 of April 14, 1994 of same contents)
05.04.2005
39
Blade installation for in-field removable MT-Propeller aluminum blades MTV-27-2
26.08.2005
40A
Oil capacity reduction plugs in the propeller hub of the propeller model MTV-9-B-S/198-58B with the engine SMA SR-305-230
23.03.2009
41R1
Flange Studs Replacement on MTV-Propeller with D-flange (ARP 502)
11.11.2013
41-1
Flange Studs Replacement on MTV-5-1-() –R(H) / MTV-27-1-( )-R(H)
04.12.2013
41-2
Flange Studs Replacement on MTV-Propellers with –A type flange
04.07.2018
44
Flange Stud Replacement on MT-Propeller with A-type flange
13.04.2007
45A
Governor Lever Exchange MTP Governors P-8()()-() and P-9()()-() series
25.06.2007
46
Work Instruction for the In-Field Final Assembly of MTV-16-1-N-C-F-R(P)/CFRLD280-65 Propeller
02.10.2007
47
Opening of Propeller Front Cover of MT-Propellers without Counterweights and without Feathering and Reversing Capability
17.10.2007
48C
Conversion from A- to R- Flange *
12.07.2010
49R1
Removal and Installation of Repair Bushing A-1251-X on hydraulic feathering propellers
17.12.2013
50
Removal and Installation of preload ring A-027-C on MTV-6-A
20.10.2008
51A
Removal and Installation of preload ring A-027-C on MTV-6-A
22.01.2009
53
Turning Connection Plug of Electric MT-Propeller Governor P-8( )3-( ) and P-8( )7-( )
07.04.2009
54R2
Propeller Governors for electricf Control P-8( )7 Series Adjustment of maximum Governing Speed Stop
23.05.2025
59R4
Removal and Installation of Deice Slip Ring at MTV-27-1-()/()()-()
21.11.2019
59-1R2
Installation of Synchrophaser Target Ring on MTV-27-1-( )/( )( )-( Without Deice System for Dornier 228 series
13.01.2022
60R4
Installation of Synchrophaser Target Ring on MTV-27-1-( )/( )( )-( Without Deice System for Dornier 228 series
24.05.2019
61-1
Cylinder Surface cleaning procedure after metal chip detection
30.03.2022
62
Setting the Pitot Switch
19.10.2014
63R1
MTV-1-( )Conversion to Dual Electrical Pitch Stop Type P-508-2
05.03.2015
64R4
Work Instruction for Final Assembly of the MTV-27-1-N-C-F-R(P)-J/CFR300-82a propeller series
17.10.2021
64-1R1
Work Instruction for Final Assembly of the MTV-27-1-E-C-F-R(P)/CFR260-65b propeller series
08.01.2018
64-2
Work Instruction for Final Assembly oft he MTV-27-1-N-C-F-R(G)-J/CFRRD285-82a Propeller Series *
Special Customer only
25.10.2016
64-3R1
Work Instruction for Final Assembly of the MTE-97( )-1-D/280-303 Propeller Series *
16.03.2017
64-4
Work Instruction for Final Assembly of MTV-14-B-C/( ) Propeller Series
21.06.2019
64-5R4
Work Instruction for Final Assembly and Disassembly of MTV-16-1-E-C-F-R(P)/CFR240-55a Propeller
09.07.2021
64-6R4
Work Instruction for Final Assembly of the MTV-27-1-E-C-F-R(G)/CFRL250-103 Propeller Series
06.03.2023
64-7R1
Work Instruction for final assembly of the MTV-27-1-E-C-F-R(P)/CFR225-55f Propeller Series for BEECHCRAFT KING AIR 200 W/ P&W PT6A-41/42/52/61
17.02.2020
64-8R1
Work Instruction for Final Assembly and Disassembly of the MTV-27-1-N-C-F-R(P)/CFR260-65b Propeller Series
31.08.2022
64-9
Work Instruction for Final Assembly and Disassembly of the MTV-47-1-(*)-C-F-R(*)/(*) Propeller Series
29.08.2024
66
Additional Carbon Layer for the Transition Section of the Single Layers Zusätzliches Karbongewebe im Übergangsbereich der einzelnen Lagen
26.11.2015
67
A-2001 Counterweight Modification Instruction
01.03.2016
68R16
Paint Process Sherwin Williams Products
Available in English and German Language!
19.01.2026
69
Inspection for possible corrosion on the propeller and engine/bearing flange and flange bolts due to penetration of salt water.
09.11.2016
70R1
Static Blade Balance Systemfor in-field on wing, single blade replacment
08.02.2018
71
Shape and Thickness of the MT-Propeller Blade Trailing Edge
03.04.2017
73R2
MTV-27-1-( )-R(H)-J/CRLD350-132b Propeller on Hovercraft 12000TD Daily Blade Inspection
18.12.2017
74
Adjustment of the maximum rpm on the Governor
04.04.2018
75R2
Paint Flaking on MT-Propeller Blades equipped with Nickel Leading Edges
20.09.2022
76
Guidelines for the Extension of Expiry Dates of Sherwin Williams Products According to the manufacturer Available in English and German language!
26.03.2018
76-1
Guidelines for the extension of expiry dates of Hexion Isamet R6/10 and Hardener 47/10 (German and English) 

obsolete
03.08.2026
76-2
Guidelines for the extension of expiry dates of EPIKOTE Resin T-30W and Hardener SF-10 (German and English)
02.07.2024
76-3
Guidelines for the extension of expiry dates of EPIKOTE MGS BPR Resin A20 and MGS BPH Hardener B20 (German/English)
06.05.2026
76-4
Guidelines for the extension of expiry dates of resoltech 3350 ECO (White) Resin and resoltech 3358T (black) hardener or EPIKOTE MGSBPR135G3 Resin Westlake and EPIKOTE MGSBPR1355G Hardener Westlake (German and English)
06.05.2026
77R2
MTV-27-1-YZ-C-R(H)-J Propeller: Inspection of blade bearing preload and hub regreasing
20.08.2024
78R1
Repair of Damaged Epoxy Bond Filler between Slip Rings
19.06.2019
81R3
Re-Painting of Blades with Flaking Paint
11.12.2023
83
Blade Track Correction Procedure
10.10.2019
84
Work Instruction for Piston Extension Replacement MTV-16-1-E-C-F-R(P)/CFR240-55 *
25.03.2020
85
Application two (2) Carbon Fiber Plies under the Steel Erosion Protection Sheath on Fixed Pitch Propeller MT 175 R 150-2Ca
29.05.2020
86R1
Work Instruction for Removal and Installation of Repair Bushing A-1251-( )
02.09.2023
88R1
Spinner dome modification for spinner P-792-( ) installed on Diamond DA42 series
19.05.2025
89
Replacement of the Guide Rod on MTV-33-1( ) and NTV-34-1-( ) Propeller Series
22.09.2023
91R1
Propeller Self-test Failure Indication
10.06.2025
92
Electrical Bonding of Spinner Backplate / Spinner Assembly to the propeller hub
21.05.2026
0
List of Overhaul Manuals
22.05.2026
E-9000 R10
List of Consumables
15.04.2026
E-220 R72
ATA 61-12-20

Hydraulically Controlled Variable Pitch Propellers (Constant Speed)
MTV - 5 - ( )
MTV - 6 - ( )
MTV - 9 - ( )
MTV - 11 - ( )
MTV - 12 - ( )
MTV - 14 - ( )
MTV - 15 - ( )
MTV - 16 - ( )
MTV - 21 - ( )
MTV - 22 - ( )
MTV - 25 - ( )
MTV - 27 - ( )
MTV - 33 - ( )
MTV - 34 - ( )
MTV - 36 - ( )
MTV - 37 - ( )
MTV - 47 - ( )
19.03.2026
E-250 R39
ATA 61-12-50

Electrically Controlled Variable Pitch Propellers (Constant Speed, Feathering and Reverse)
MTV - 1 - ( )
MTV - 7 - ( )
MTV - 10 - ( )
MTV - 17 - ( )
MTV - 18 - ( )
MTV - 20 - ( )
MTV - 23 - ( )
30.10.2025
E-310 R8
ATA 61-13-10

Mechanische Verstellpropeller
MTV - 24 - ( )
21.01.2003
E-373 R14
ATA 61-13-73

Hydraulically Controlled Variable Pitch Propellers (Constant Speed)
MTV - 2 - ( )
MTV - 3 - ( )
03.07.2008
E-497 R5
ATA 61-14-97

MT-Wood Composite Fixed Pitch Propellers
07.11.2025
E-519 R43
ATA 61-15-19

Hydraulically Controlled Variable Pitch Propellers (Constant Speed) with Reverse Thrust Capability (Dual Piston-System)
MTV - 5 - ( ) - R (M)
MTV - 6 - ( ) - R (M)
MTV - 9 - ( ) - R (M)
MTV - 12 - ( ) - R (M)
MTV - 14 - ( ) - R (M)
MTV - 15 - ( ) - R (M)
MTV - 16 - ( ) - R (M)
MTV - 21 - ( ) - R (M)
MTV - 25 - 2 - ( ) - R (M)
MTV - 27 - ( ) - R (M)
MTV - 37 - ( ) - R (M)
MTV - 47 - ( ) - R (M)
30.10.2025
E-520 R29
ATA 61-15-20

Reversible Hydraulically Controlled Variable Pitch Propellers (Constant Speed) (Spring System) MTV - 25 - 1 - ( ) - R (M)
12.02.2015
E-526 R5
ATA 61-15-26

Hydraulic Propeller Governor (Regler) P - 480 - ( ) series
27.05.2005
E-571 R15
ATA 61-15-71

Hydraulically Controlled Variable Pitch Propeller MTV - 8 - ( )
27.02.2015
E-680 R57
ATA 61-16-80

Reversible Hydr. Controlled Variable Pitch Propeller (Constant Speed Prop.)
MTV-5-( )-R(A), (P)
MTV-9-( )-R(A), (DA),(P), (W)
MTV-14-( )-R(A)
MTV-16-( )-R(A), (G), (P), (W)
MTV-25-( )-R(A)
MTV-27-( )-R(G), (P), (W), (GE)
MTV-27-( )-R(G)-J
MTV-27-( )-R(P)-J
MTV-37-( )-R(P), (G)
MTV-47-( )-R(P), (G)
MTV-47-( )-R(P)-V
22.01.2026
E-700 R12
ATA 61-27-00

Hydraulic Accumulator
P - 447 - ()
P - 726 - ()
P - 832 - ()
P - 893 - ()
P - 905 - ()
P - 952 - ()
P - 1379 - ()
30.10.2025
E-808 R17
ATA 61-18-08

Standard Practices Manual
22.01.2015
E-808 R3
ATA 61-18-09

Overhaul Manual Metal Blades
28.05.2015
E-951
ATA 61-29-51

Hydraulic Propeller Governor (Regler)
P - 41( ) - ( )
P - 42( ) - ( )
P - 43( ) - ( )
P - 44( ) - ( )
01.08.2003
E-1047 R20
ATA 61-20-47

Hydraulic Propeller Governor (Regler)
P - 9 ( ) ( ) - ( ) series
21.01.2026
E-1049 R34
ATA 61-20-49

Hydraulic Propeller Governor (Regler)
P - 8 ( ) ( ) - ( ) series
20.01.2026
E-1290 R49
ATA 61-12-90

Overhaul Manual Composite Blades
19.01.2026
E-1985 R5
ATA 61-19-85

5400-Serien Einstellpropeller mit Metallblättern
5400-series Ground Adjustable Propeller with Metal Blades
20.12.2013
E-2286 R8
ATA 61-12-86

Ground Adjustable or Hydraulically controlled Variable Pitch Propeller
MTV-33-( )
MTV-34-( )
MTV-36-( )
15.05.2024
E-2392 R4
ATA 61-12-392

Reversible Hydraulically Controlled variable Pitch Propeller (Hovercraft / Airship)
MTV-5-( )-R(H)
MTV-6-( )-R(H)
MTV-16-( )-R(H)
MTV-22-( )-R(H)
MTV-25-( )-R(H)
MTV-27-( )-R)H)
MTV-27-( )-R)H)-J
30.10.2025
E-2492 R3
ATA 61-12-492

Allison Beta System P-846
15.12.2016
0
List of Operation and Installation Manuals
22.05.2026
E-112 R26
ATA 61-01-12

MT-Holz-Composite Festpropeller
MT-Wood-Composite Fixed Pitch Propellers
26.02.2019
E-118 R49
ATA 61-01-18

Elektrische Verstellpropeller
Electrically Controlled Variable Pitch Propellers (Constant Speed, Feathering and Reverse)
MTV - 1 - ( )
MTV - 7 - ( )
MTV - 10 - ( )
MTV - 17 - ( )
MTV - 18 - ( )
MTV - 20 - ( )
MTV - 23 - ( )
03.03.2025
E-124 R75
ATA 61-01-24

Hydraulische Verstellpropeller
Hydraulically Controlled Variable Pitch Propellers (Constant Speed)
MTV - 5 - ( )
MTV - 6 - ( )
MTV - 9 - ( )
MTV - 11 - ( )
MTV - 12 - ( )
MTV - 14 - ( )
MTV - 15 - ( )
MTV - 16 - ( )
MTV - 21 - ( )
MTV - 22 - ( )
MTV - 25 - ( )
MTV - 27 - ( )
MTV - 37 - ( )
MTV - 47 - ( )
19.03.2026
E-148 R21
ATA 61-01-48

Hydraulische Verstellpropeller
Hydraulically Controlled Variable Pitch Propellers (Constant Speed)
MTV - 2 - ( )
MTV - 3 - ( )
15.05.2024
E-309 R11
ATA 61-03-09

Mechanische Verstellpropeller
Mechanically Variable Pitch Propeller
MTV - 24 - ( )
09.02.2010
E-445 R1
Hydraulischer Verstellpropeller
Hydraulically Controlled Variable Pitch Propeller
MTV - 8 - H - F (Strato 2C)
01.02.1995
E-494 R2
Ölzuführung
MTV - 8 - H / 300 - 48 (Airodium)
29.03.2005
E-496
Hydraulischer Verstellpropeller
MTV - 8 - H - C (Airodium)
01.03.1996
E-504 R46
ATA 61-05-04

Reversierbare hydraulische Verstellpropeller
Reversible Hydraulically Controlled Variable Pitch Propellers (Constant Speed)
MTV - 5 - ( ) - R (M)
MTV - 6 - ( ) - R (M)
MTV - 9 - ( ) - R (M)
MTV - 12 - ( ) - R (M)
MTV - 14 - ( ) - R (M)
MTV - 15 - ( ) - R (M)
MTV - 16 - ( ) - R (M)
MTV - 21 - ( ) - R (M)
MTV - 25 - 2-( ) - R (M)
MTV - 27 - ( ) - R (M)
MTV - 37 - ( ) - R (M)
MTV - 47 - ( ) - R (M)
30.10.2025
E-508 R6
ATA 61-25-08

Hydraulic Propeller Governor (Regler)
P - 480 - ( ) series
12.06.2002
E-570 R10
ATA 61-05-70

Hydraulically Controlled Variable Pitch Propeller
MTV - 8 - ()
26.02.2019
E-610 R51
ATA 61-06-10

Reversierbare hydraulische Verstellpropeller
Reversible Hydraulically Controlled Variable Pitch Propellers (Constant Speed)
MTV - 5 - ( ) - R (A), (P)
MTV - 9 - ( ) - R (A), (P), (W)
MTV - 14 - ( ) - R(A)
MTV - 16 - ( ) - R (A), (G), (P), (W)
MTV - 25 - ( ) - R (A)
MTV - 27 - ( ) - R (G), (P), (W), (GE)
MTV - 37 – ( ) - R (P), (G)
MTV - 47 – ( ) - R (P), (G)
 
23.09.2025
E-623
ATA 61-06-23

Hydraulically Controlled Variable Pitch Propellers (Constant Speed)
MTV - 27 - 1 - E - C - F
Airfoil-Flairboat

 
19.02.1999
E-699 R8
ATA 61-26-99

Hydraulic Constant Speed Governors
P - 41( ) - ( )
P - 42( ) - ( )
P - 43( ) - ( )
P - 44( ) - ( )
12.01.2007
E-779 R2
ATA 61-07-79

Betriebs- und Einbauanweisung
MTE - 843 - D (Schwebegerät)
30.06.2005
E-1046 R14
ATA 61-20-46

Hydraulic Propeller Governor
P - 9 ( ) ( ) - ( ) series
21.05.2026
E-1048 R24
ATA 61-20-48

Hydraulic Constant Speed Governor
P - 8 ( ) ( ) - ( ) series
21.05.2026
E-1083 R39
ATA 61-00-83

Reversible Hydraulically controlled variable pitch propeller (for PT6A-67 series)
MTV - 16 - 1 - ( ) - R (P)
MTV - 27 - 1 - ( ) - R (P)
MTV - 27 - 1 - ( ) - R (P) - J
MTV - 27 - 2 - ( ) - R (P)
MTV - 47 - 1 - ( ) - R (P)
MTV - 47 - 1 - ( ) - R (P) - V
15.05.2024
E-1298 R26
ATA 61-02-98 

Reversible Hydraulically Controlled Variable Pitch Propeller (Hovercraft / Airship)

MTV - 5 - ( ) - R (H)
MTV - 6 - ( ) - R (H)
MTV - 9 - ( ) - R (H)
MTV - 16 - ( ) - R (H)
MTV - 22 - ( ) - R (H)
MTV - 25 - ( ) - R (H)
MTV - 27 - ( ) - R (H)
MTV - 27 - ( ) - R (H)  - J
30.10.2025
E-1903 R10
ATA 61-09-03

Hydraulically controlled variable Pitch Propeller (constant speed and feathering)
MTV - 4 - 1 - T / 50 - C - F
For Allison V2720-( ) and V-1650-( )
15.05.2024
E-1922 R16
ATA 61-09-22

Reversible Hydraulically controlled variable Pitch Propeller
MTV - 27 - 1 - N - C - F - R (G) - J
MTV - 27 - 1 - ( ) - R (P) - J
MTV - 27 - 1 - N - C - F - J
15.05.2024
E-1984 R10
ATA 61-09-84

5400- Serien Einstellpropeller mit Metalblättern
5400- series Ground Adjustable Propeller with Metal Blades
08.03.2016
E-2197 R1
ATA 61-01-97

Hydraulically controlled Variable Pitch Propeller MTV-28-()
For wind tunnel applications
26.02.2019
E-2285 R10
ATA 61-02-85

Ground Adjustable or Hydraulically controlled Variable Pitch Propeller
MTV - 33 - ( )
MTV - 34 - ( )
MTV - 36 - ( )
15.05.2024
E-2565 R8
ATA 61-25-65

Electronic Synchrophaser Control Box
( )-213796 MT
15.02.2022
E-2872
ATA 61-28-72

Power Pack P-8HO-( )
25.03.2016
E-3719 R6
ATA 61-07-19

Reversible Hydraulically Controlled Variable Pitch Propeller MTV-28-2-( )-R(H)
30.10.2025
E-3760 R7
ATA 61-07-60

Electric De-Ice Controller
23.09.2025
E-3854 R2
ATA 61-08-54

Hydraulic Overspeed Governor P-8S( )-( ) Series
19.03.2026
E-3896
ATA 61-08-96

Power Pack P-8HO-2-( )
22.10.2021
E-4230 R1
ATA 61-02-30

Reversible Hydraulically Controlled variable Pitch Propeller MTV-9-( )-R(DA)
01.08.2024
E-4369
ATA 61-43-69

Beta Valve P-8PPC-1 - only for specific customers -
24.05.2024
E-1057
Governor Installation List
28.05.2026
1
Installation of Lever Extension on Speed Adjusting Lever
24.10.2007
2A
Installation of Governor Conversion Kit Pitts S2B
11.07.2012
3
Propeller Governor Adjustment Unit T-719a

Replaced by SI-54
23.05.2025
Cessna 182() - E-4355 R2
MTV-9-B/200-52( ) Propeller on Cessna 182S, 182T
14.04.2026
Cessna 208 - E-2096 R1
MTV-27-1-E-C-F-R(P)/CFR245-55a ON CESSNA AIRCRAFT COMPANY 208 and 208B
23.06.2026
Mooney M20() - E-4158 R2
MTV-12-B/180-59( ) Propeller on M20A, M20B, M20C, M20D
14.04.2026
Pilatus PC-12/47E, G - E-3666 E-3660 R4
MTV-47-1-N-C-F-R(P)-V/CFR260-361( ) ON Pilatus PC-12/47E with S/N 1720, 2001 and up with PT6E-67XP engine
AND Pilatus PC-12/47G with S/N 3001 and up with PT6E-67XP engine
13.04.2026
Vulcanair P.68() - E-1372 R3
MTV-12-B-C-F/CF183-59b ON Vulcanair S.P.A. P.68, P.68B, P.68C, P.68 OBSERVER, P.68 OBSERVER 2
OR
MTV-12-B-C-F/CF183-53 (Optional equipped with Liese muffler 75x8x100) ON Vulcanair S.P.A. P.68, P.68B, P.68C, P.68R, P.68 OBSERVER, P.68 OBSERVER 2
25.04.2025
Vulcanair P.68()-() - E-1376 R3
MTV-12-B-C-F/CF188-53 ON VULCANAIR MODELS P.68C-TC, P.68TC Observer

Supersedes E-1442
25.04.2025

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More about us

MT-Propeller was founded in 1980 by Gerd Muehlbauer, who had already 20 years of experience in propeller development and service at this time. He started his new own company on January 2nd 1981 at the Airport Straubing-Wallmuehle (EDMS) in Germany with 6 employees in a small, one-storey airport owned building.
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