SA00780SE (PAGE 4)
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
- CPAC Inc.; CPAC Inc.; CPAC Inc.; CPAC Inc.; CPAC Inc.; CPAC Inc.; CPAC Inc.; CPAC Inc.; Cub Crafters Inc.; Cub Crafters Inc.; Helio Aircraft LLC; Helio Aircraft LLC; Helio Aircraft LLC; Helio Aircraft LLC; Helio Aircraft LLC; Helio Aircraft LLC; Helio Aircraft LLC; Helio Aircraft LLC; Helio Aircraft LLC; REVO Incorporated; REVO Incorporated; REVO Incorporated; REVO Incorporated; REVO Incorporated; REVO Incorporated; REVO Incorporated; Viking Air Limited; Viking Air Limited; Viking Air Limited
- Models
- 112, 112B, 112TC, 112TCA, 114, 114A, 114B, 114TC, CC18-180, CC18-180A, H-250, H-295 (USAF U10D), H-391 (USAF UL-24), H-391B, H-395 (USAF L-28A or U-10B), H-395A, H-700, H-800, HT-295, Colonial C-1, Colonial C-2, Lake LA-4-200, Lake LA-4, Lake LA-4A, Lake LA-4P, Lake Model 250, DHC-2 Mk.I, DHC-2 Mk.II, DHC-2 Mk.III
- Type certificates
- A12SO, A12SO, A12SO, A12SO, A12SO, A12SO, A12SO, A12SO, A00006SE, A00006SE, 1A8, 1A8, 1A8, 1A8, 1A8, 1A8, 1A8, 1A8, 1A8, 1A13, 1A13, 1A13, 1A13, 1A13, 1A13, 1A13, A-806, A-806, A-806
- On this site
- Commander Aircraft Co 114 103 registered
Consolidated Aeronautics Inc. LAKE LA-4 15 registered
Consolidated Aeronautics Inc. LAKE LA-4-200 140 registered
Cub Crafters Inc CC18 51 registered
Cub Crafters CC18 33 registered
Dehavilland DHC-2 254 registered
Helio Aircraft Ltd H800 6 registered
Helio H-250 11 registered
Helio H-295 54 registered
Helio H-391 16 registered
Helio H-395 17 registered
Helio HT-295 13 registered
Rockwell International 112 207 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.