SA3-363
Installation of Doyn Fiberglass Wheel Fairings in accordance with Doyn Drawingg No. 1300 and Doyn Process Specification for Fiberglass Parts No. PS-100. Held by D'Shannon Products LTD., which holds 118 approved modifications in all. Last revised August 16, 2011. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Piper Aircraft Inc.
- Models
- PA-22
- Type certificate
- 1A6
- On this site
- Piper PA-22 Tri-Pacer and Colt 2,942 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 22, 2026.