The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · reissued

SA2508SO

Replacement of Cleveland brake discs, No. 164-67 or 164-167, with Appalachian Accessories' stainless steel brake discs, Part No. 73-67. Held by Aviation Products, INC, which holds 64 approved modifications in all. Last revised September 29, 1995. System: landing gear.

What it applies to

Kind of product
Aircraft
Design holder
The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.
Models
PA-16, PA-16S, PA-18, PA-20, J3P, J4B, J4F, J3 Series, PA-11S, J3C-65S, J3C-40, J3C-50, J3C-65, PA-11, J3C-50S, J3F-50S, J3F-60, J3F-60S, J3F-65 (Army L-4D), J3F-65S, J3 Series, J3F-50, J3 Series, J3L, J3L-S, J3L-65S, J3L-65 (Army L-4C), J4, J4A, J5A (Army L-4F), J5A-80, J5C, J5 Series, J4E (Army L-4E), PA-14, PA-15, PA-17, J-3
Type certificates
1A1, 1A1, 1A2, 1A4, 695, 708, 721, A-691, A-691, 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-692, A-698, A-698, A-698, A-698, A-698, A-703, A-703, A-725, A-725, A-725, A-725, A-740, A-797, A-800, A-805, ATC 660
On this site
Piper/Cub Crafters PA-18 46 registered
Piper J-3 Cub 3,804 registered
Piper J4 Cub Coupe 197 registered
Piper J5 Cub Cruiser 294 registered
Piper PA-11 Cub Special 443 registered
Piper PA-14 100 registered
Piper PA-15 165 registered
Piper PA-16 Clipper 276 registered
Piper PA-17 Vagabond 97 registered
Piper PA-20 Pacer 323 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 20, 2026.