SA1078WE
Installation of Franklin 6A-335-B engine with McCauley 2A31C/84S-6 propeller using EDO 89-2000 floats. (172B, 172C, 172D, 172E, 172F, 172G LAND OR SEAPLANE). Held by Franklin Aircraft Engines INC., which holds 18 approved modifications in all. Last revised July 19, 2000. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company
- Models
- 172G, 172E, 172C, 172B, 172D, 172F (USAF T-41A)
- Type certificates
- 3A12, 3A12, 3A12, 3A12, 3A12, 3A12
- On this site
- Cessna 172 Skyhawk 20,669 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.