SA1483NM
Installation of Lycoming IO-540K, L. P. and S series engine, modified engine mount, Harrison oil cooler, Hartzell model AP18AV06-03 oil cooler, Hartzell HC-C2YK-1BF/F8475R-2 propeller and associated systems. Held by Seaplane Flying INC, which holds 18 approved modifications in all. Last revised March 29, 1982. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Cessna Aircraft Company; Cessna Aircraft Company
- Models
- A185E, A185F
- Type certificates
- 3A24, 3A24
- On this site
- 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 21, 2026.