SA2337SO
Replacement of Cleveland brake discs, P/N 164-22A, and/or 164-23 or 164-123, with Appalachian Accessories' stainless steel brake discs, P/N 75-23. Held by Appalachian Accessories, which holds 45 approved modifications in all. Last revised May 17, 1988. 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.
- Models
- PA-24-400, PA-44-180, PA-44-180T, PA-30, PA-32-301, PA-32-260, PA-32-300, PA-32R-300, PA-32RT-300, PA-32RT-300T, PA-34-200
- Type certificates
- 1A15, A19SO, A19SO, A1EA, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A7SO
- On this site
- Piper PA-24 Comanche 2,428 registered
Piper PA-30 Twin Comanche 879 registered
Piper PA-32 Cherokee Six, Lance and Saratoga 3,917 registered
Piper PA-34 Seneca 998 registered
Piper PA-44 Seminole 599 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 12, 2026.