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

SA02214AK

Installation of Alpha Omega Suspension System in place of original bungees or bungees and hydasorbs. Held by Burl'S Aircraft Rebuild LLC, which holds 3 approved modifications in all. Last revised March 18, 2022. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
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. ATC; Piper Aircraft Inc. ATC
Models
J5A (Army L-4F), J5B (Army L-4G), J5C, PA-14, PA-12, PA-12S, PA-18, PA-18-135, PA-18-150, PA-18A, PA-18A-150, PA-18AS-135, PA-18S, PA-18S-150, J3C-40, J3C-50, J3C-50S, J3C-65 (Army L-4; L-4A; L-4B (Navy NE-1); L-4H; L-4J (Navy NE-2)), J3C-65S, PA-11, PA-11S, PA-18A-150 (Restricted), PA-18A (Restricted), J-2, J-3
Type certificates
A-725, A-725, A-725, A-797, A-780, A-780, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, A-691, A-691, A-691, A-691, A-691, A-691, A-691, AR-7, AR-7, 595, 660
On this site
Piper/Cub Crafters PA-18 46 registered
Piper J-2 48 registered
Piper J-3 Cub 3,805 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-18 Super Cub 3,620 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 21, 2026.