SA2933SO
Installation of a Teledyne Continental Motors model IO-550-D engine and Hartzell model PHC-C3YF-1RF/F7691(), PHC-C3YF-1RF/F8468A()-6R, or HC-C3YF-1RF9587C-15S, or McCauley model D3A34C401/90DFA-10 or -8, or B2A37C228/90RDA propeller. (A185E AG) (A185F A G). Held by Davis Aviation Services INC, which holds 11 approved modifications in all. Last revised February 18, 1999. 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; The Cessna Aircraft Company; The Cessna Aircraft Company
- Models
- 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F
- Type certificates
- 3A24, 3A24, 3A24, 3A24, 3A24, 3A24, 3A24, 3A24
- On this site
- Cessna 185 Skywagon 227 registered
Cessna A185 Skywagon 1,372 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.