SA1888CE
Operation of airplane on unleaded and leaded automotive gasoline. Held by Petersen Aviation INC, which holds 167 approved modifications in all. Last revised July 26, 1983. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Weatherly Aviation Company Inc.; Weatherly Aviation Company Inc.; Weatherly Aviation Company Inc.; Weatherly Aviation Company Inc.
- Models
- 201, 201A, 201B, 201C
- Type certificates
- A10WE, A10WE, A10WE, A10WE
- On this site
- Weatherly 201 12 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.