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

SA2269SO

Replacement of Cleveland brake discs P/N 164-9 or 164-109, with Appalachian Accessories' stainless steel brake discs, P/N 73-9. 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.
Models
PA-24-250, PA-24, PA-28-235
Type certificates
1A15, 1A15, 2A13
On this site
Piper PA-24 Comanche 2,428 registered
Piper PA-28 Cherokee, Warrior, Archer and Arrow 18,636 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.