SA99AL
Installation of six-inch wheels and brakes. Held by Univair Aircraft CORP, which holds 40 approved modifications in all. Last revised July 9, 1981. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- FS 2001 Corp.; FS 2001 Corp.; FS 2001 Corp.; FS 2001 Corp.; FS 2002 Corp.; FS 2003 Corp.; FS 2003 Corp.; 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.
- Models
- J5A-80, J5A (Army L-4F), J5B (Army L-4G), J5C, PA-14, PA-12, PA-12S, J3F-50, J3F-50S, J3F-60, J3F-60S, J3F-65 (Army L-4D), J3F-65S, J3L-65 (Army L-4C), J3L-65S, J3L-S, J3L, J4, J4A-S, J4A, J4E (Army L-4E), PA-11, PA-15, PA-16, PA-16S, PA-17, PA-18-105 (Special), PA-18-125 (Army L-21A), PA-18-135, PA-18-150, PA-18, PA-18A-135, PA-18A-150, PA-18A, PA-18AS-125, PA-18AS-135, PA-18AS-150, PA-18S-105 (Special), PA-18S-125, PA-18S-135, PA-18S-150, PA-18S, PA-20-115, PA-20-135, PA-20, PA-20S-115, PA-20S-135, PA-20S
- Type certificates
- A-725, A-725, A-725, A-725, A-797, A-780, A-780, A-692, A-692, A-692, A-692, A-692, A-692, A-698, A-698, A-698, A-698, A-703, A-703, A-703, A-740, A-691, A-800, 1A1, 1A1, A-805, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A4, 1A4, 1A4, 1A4, 1A4, 1A4
- On this site
- Piper J-3 Cub 3,806 registered
Piper J4 Cub Coupe 197 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-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 7, 2026.