SA1521GL
Installation of Flap, Aileron, Flap/Fuselage, and Stabilator Gap Seals. Held by Knots 2U LTD, which holds 7 approved modifications in all. Last revised March 29, 2010. System: flight controls.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.
- Models
- PA-32-301, PA-32-301FT, PA-32-301T, PA-32-301XTC, PA-32R-301 (HP), PA-32R-301 (SP), PA-32R-301T
- Type certificates
- A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO
- On this site
- Piper PA-32 Cherokee Six, Lance and Saratoga 3,917 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 5, 2026.