SA3300NM
Use of unleaded automobile gasoline, 87 minimum antiknock and 88 minimum antiknock index leaded automobile gasoline. Held by Wiley'S Seaplanes, which holds 4 approved modifications in all. Last revised November 5, 1985. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Cessna Aircraft Company; Cessna Aircraft Company; Cessna Aircraft Company
- Models
- 120, 140, 140A
- Type certificates
- A-768, A-768, 5A2
- On this site
- Cessna 120 660 registered
Cessna 140 1,839 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.