Service Letters
download this list as .pdf file
| No. | Content | Date of Revision |
|---|---|---|
| SL1 (.pdf, 12k) |
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. |
May 12, 1999 |
| SL2 |
Aeroshell No. 5 is used instead of Aeroshell No. 6. Affected Propellers: All Constant Speed Propellers. Replaced by Service Letter No. 21 |
May 12, 1999 |
| SL3 (.pdf, 10k) |
Modification of the pitch change pin location. Affected Propellers: All Constant Speed Propellers. |
May 12, 1999 |
| SL4 |
Introduction of DF O-Rings. Affected Propellers: All Constant Speed Propellers. Replaced by Service Letter No. 14 |
May 12, 1999 |
| SL5 (.pdf, 9k) |
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. |
May 12, 1999 |
| SL6A (.pdf, 9k) |
Modification of Counterweights A-597-B. Affected Propellers: MTV-9-B-C/CL250-27, MTV-9-B-C/CL260-27 |
May 12, 1999 |
| SL7A (.pdf, 19k) |
Replacement of screws M3x10 by M3x12. Affected Propellers: All Electric Constant Speed Propellers |
March 05, 2003 |
| SL8 (.pdf, 9k) |
Introduction of Resin A 20 + Hardener B20 Affected Propellers: All natural composite blades |
Nov 29, 1999 |
| SL9A (.pdf, 9k) |
Replacing of blade bearings A-317, A-233, A-004 Affected Propellers: All variable pitch propellers |
Aug 27, 2001 |
| SL10 (.pdf, 16k) |
Teardown inspection at 1/3 TBO. Affected Propellers: All Variable Pitch Aerobatic Propellers. |
March 01, 2000 |
| SL11 (.pdf, 9k) |
Installation of standard electric pitch change motor Affected Propellers: All Electric Constant Speed Propellers. |
April 05, 2000 |
| 12 |
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| SL13 (.pdf, 8k) |
Painting of Counterweights Affected Propellers: All Counterweighted Propellers |
July 11, 2002 |
| SL14D (.pdf, 14k) |
New blade seals in MT-Propeller constant speed propellers. Affected Propellers: All MTV Constant Speed Propellers. |
March 20, 2003 |
| SL15 (.pdf, 106k) |
New counterweights Affected Propellers: All MT-Propellers with the new counterweights installed |
Nov 27, 2000 |
| SL16 (.pdf, 9k) |
Erosion Sheath on fixed pitch propeller Affected Propellers: All Fixed Pitch Propellers with a Diameter > 69.3 inch |
Feb 01, 2001 |
| SL17C (.pdf, 13k) |
Replacement of MTV-9/ -12/ -14/ -15 hub (serial numbers up to 97xxx). Affected Propellers: MTV-9, MTV-12, MTV-14, MTV-15 |
March 09, 2011 |
| SL18C (.pdf, 70k) |
Additional Installation of PTFE back up ring Affected Propellers: MTV-9-( ), MTV-12, MTV-14-( ) |
Nov 09, 2010 |
| SL19 (.pdf, 9k) |
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. |
Oct 24, 2001 |
| SL20A (.pdf, 72k) |
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). |
Feb 19, 2009 |
| SL21B (.pdf, 21k) |
Replacement of Aeroshell 5 by MT 2 Propeller Grease including improvement of viscosity | Nov 04, 2002 |
| SL22K (.pdf, 71k) |
Leading edge installation MT-Propeller Constant Speed Propeller Blades of type: C188-18b, C190-18b, C193-18b, C198-25, ()225-37a, ()180-59, ()180-59b, ()183-17e (-A), ()183-59, ()183-59b, ()188-59b, CFLR250-55b Affected Propellers: MT-Propeller Constant Speed Propeller |
March 09, 2011 |
| SL23C (.pdf, 14k) |
Grease Leakage Problem. Affected Propellers: MTV-12-B/180-17 installed on Diamond DA40 with Lyc. IO-360-M1A. |
March 21, 2003 |
| SL24A (.pdf, 14k) |
Torque of Check Nuts and Slotted Nuts. Affected Propellers: All hydraulic MTV-Propellers. |
March 07, 2003 |
| SL25 (.pdf, 20k) |
Replacement of return spring, part no. A-085 by new return spring part no. D-389-K Affected Propeller: MTV-6( ) |
Jan 28, 2004 |
| SL26A (.pdf, 72k) |
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) |
Nov 12, 2004 |
| SL27B (.pdf, 67k) |
Cure date and shelf live of MT-Propeller O-Rings Affected Propeller: All hydraulic and electric constant speed MT-Propeller. |
Nov 09, 2010 |
| SL28 (.pdf, 36k) |
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 |
July 03, 2006 |
| SL29C (.pdf, 51k) |
Leading Edge Installation Installed on Husky A1-( ) Propeller MTV-15-B/210-58 and MTV-15-B/205-58 and ACA Scout MTV-15-B/203-58 Affected Propeller: MTV-15-B/210-58 and MTV-15-B/205-58 installed on Husky A1 and ACA Scout MTV-15-B/203-58 | March 19, 2007 |
| SL30D (.pdf, 54k) |
Fluid De-Ice Boot Installation on MT-Propeller Composite Blades | June 18, 2009 |
| SL31A (.pdf, 88k) |
MTV-9-B-S/198-58B Rework and Modification of Blade Preload-Nut A-1368 and Blade Ferrule A-1367 | Feb 12, 2008 |
| SL32B (.pdf, 1.9MB) |
MT-, MTE and MTV-Propellers with natural Composite Blades In-Field-Repairs |
Sept 05, 2011 |
| SL33A (.pdf, 71k) |
Shrouded Propeller Installation (if not enough clearance between blade tip and shroud) | Jan 20, 2009 |
| SL34 (.pdf, 116k) |
MTV-9-B-S/198-58B installed on Cessna 182 (SMA-Application) with Propeller hub A-926-2-( ) | Oct 20, 2008 |
| SL35A (.pdf, 63k) |
All MT-Constant Speed Propellers Cleaning of Parts and Hubs by Glass / Plastic Media Blasting |
March 13, 2009 |
| SL36 (.pdf, 90k) |
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) |
May 07, 2009 |
| SL37A |
Propeller Governors for Electric Control P-857 / P-877 series Correct Adjustment of Travel of Speed Change Nut |
July 15, 2009 |
| SL38A (.pdf, 100k) |
Procedure for the Installation of the Preload System P-890 Affected Proeller: MTV-12, MTV-14, MTV-22 |
Oct 25, 2011 |
| SL39 | Start Lock Springs Exchange of Start Lock Springs, Identification of Springs (for special customer only) |
Oct 07, 2009 |
| SL40 | Propeller Governors for Electric Control P-853, P-877 series Installation of the Flexible Max Speed Stop Modification “D” (for special customer only) |
Nov 10, 2009 |
| SL41 (.pdf, 140k) |
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 |
March 10, 2010 |
| SL42 (.pdf, 460k) |
Propeller Designation System | March 21, 2010 |
| SL43 (.pdf, 90k) |
Cure Date and Shelf Life of MT-2 Propeller Grease | May 09, 2011 |
| SL44 | (Internal) | |
| SL45 | (Internal) |
