SA00780SE (PAGE 1)
Installation of the True Lock Safety Retention Axle Lock Nut System. Held by True Lock LLC, which holds 4 approved modifications in all. Last revised June 28, 2016. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Bell Helicopter Textron Canada Limited; Bell Helicopter Textron Canada Limited; Bell Helicopter Textron Canada Limited; Bell Helicopter Textron Canada Limited; Bell Helicopter Textron Canada Limited; Bell Helicopter Textron Canada Limited; Bell Helicopter Textron Canada Limited; Bell Helicopter Textron Canada Limited; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company; Dynac Aerospace Corporation; Dynac Aerospace Corporation; Dynac Aerospace Corporation; Dynac Aerospace Corporation; Dynac Aerospace Corporation; FS 2001 Corp.; FS 2001 Corp.; FS 2001 Corp.; FS 2001 Corp.; FS 2001 Corp.; FS 2001 Corp.; FS 2002 Corp.; FS 2003 Corp.; Gulfstream Aerospace Corporation; Gulfstream Aerospace Corporation; Gulfstream Aerospace Corporation; Lavia Argentina S.A.(Laviasa); Lavia Argentina S.A. (Laviasa); Lavia Argentina S.A. (Laviasa); Lavia Argentina S.A. (Laviasa); Lavia Argentina S.A. (Laviasa); Lavia Argentina S.A. (Laviasa); Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Gippsland Aeronautics Pty. Ltd.
- Models
- 360, 400, PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P), PA-60-602P (Aerostar 602P), PA-60-700P (Aerostar 700P), 206A, 206A-1 (OH-58A), 206B, 206L, 206L-1, 206L-3, 206L-4, 407, 172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K, 172L, 172M, 172N, 172P, 172Q, 172R, 172S, 172RG, 175, 175A, 175B, 175C, P172D, R172E, R172F, R172G, R172H, R172J, R172K, 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, 152, A150K, A150L, A150M, A152, 140A, 120, 140, 170, 170A, 170B, F150G, F150H, F150J, F150K,...
- Type certificates
- A11WE, A11WE, A17WE, A17WE, A17WE, A17WE, A17WE, H2SW, H2SW, H2SW, H2SW, H2SW, H2SW, H2SW, H2SW, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A17, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 5A2, A-768, A-768, A-799, A-799, A-799, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A13EU, A18EU, A18EU, A18EU, A18EU, A18EU, A18EU, A4EU, A4EU, A4EU, A4EU, A4EU, A4EU, A4EU, A4EU, A4EU, A4EU, 1A21, 1A21, 1A21, 1A21, 1A21, A-725, A-725, A-725, A-725, A-725, A-725, A-797, A-780, A12EA, A12EA, A12EA, 2A10, 2A10, 2A10, 2A8, 2A8, 2A8, 1A1, 1A10, 1A10, 1A10, 1A10, 1A10, 1A15, 1A15, 1A15, 1A15, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A4, 1A4, 1A4, 1A4, 1A4, 1A4, 1A6, 1A6, 1A6, 1A6, 1A6, 1A6, 1A6, 1A6, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, A-691, A-691, A-691, A-691, A-691, A-691, A-692, A-692, A-692, A-692, A-692, A-692, A-698, A-698, A-698, A-703, A-703, A-740, A-800, A-805, A10SO, A10SO, A10SO, A18SO, A19SO, A19SO, A1EA, A1EA, A1EA, A20SO, A20SO, A20SO, A20SO, A23SO, A23SO, A23SO, A25SO, A25SO, A25SO, A32SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A7SO, A7SO, A7SO, A8EA, A8EA, A8EA, A8EA, A8EA, A8EA, A9SO, A9SO, A9SO, ATC 595, A00001LA
- On this site
- Bell 206 JetRanger and LongRanger 1,455 registered
Bell 407 984 registered
Cessna 172 Skyhawk 20,670 registered
Cessna A150 232 registered
Cessna A152 48 registered
Cessna P172 23 registered
Cessna R172 Hawk XP 758 registered
Piper J-3 Cub 3,806 registered
Piper J5 Cub Cruiser 294 registered
Piper PA-11 Cub Special 443 registered
Piper PA-12 Super Cruiser 1,247 registered
Piper PA-14 100 registered
Piper PA-15 165 registered
Piper PA-16 Clipper 276 registered
Piper PA-17 Vagabond 96 registered
Piper PA-18 Super Cub 3,621 registered
Piper PA-19 15 registered
Piper PA-20 Pacer 323 registered
Piper PA-22 Tri-Pacer and Colt 2,940 registered
Piper PA-23 Apache and Aztec 1,316 registered
Piper PA-24 Comanche 2,428 registered
Piper PA-25 Pawnee 455 registered
Piper PA-28 Cherokee, Warrior, Archer and Arrow 18,633 registered
Piper PA-30 Twin Comanche 879 registered
Piper PA-31 Navajo and Chieftain 935 registered
Piper PA-32 Cherokee Six, Lance and Saratoga 3,917 registered
Piper PA-34 Seneca 998 registered
Piper PA-36 Pawnee Brave 99 registered
Piper PA-38 Tomahawk 442 registered
Piper PA-39 Twin Comanche C/R 82 registered
Piper PA-42 59 registered
Piper PA-44 Seminole 599 registered
Piper PA-46 Malibu, Mirage, Matrix and M-Class 1,692 registered
Piper PA-60 Aerostar 57 registered - The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 7, 2026.