SA915SO
Lower forward longeron reinforce- ment by adding tubing in trangle shape outboard between fore and aft wing spar root attach fittings and modifying wing root rib to fit over modified longeron. Held by Aircraft Service Center, INC. Last revised January 6, 1977. System: airframe structure.
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-25-235 (Restricted Cat.), PA-25-260 (Restricted Cat.), PA-25 (Restricted Cat.)
- Type certificates
- 2A10, 2A10, 2A10
- On this site
- Piper PA-25 Pawnee 455 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.