SA525NW
Installation of Continental IO-520-D engine and McCauley D2A34C58/90AT-4 propeller. Held by Kenmore Air Harbor LLC, which holds 56 approved modifications in all. Last revised April 5, 2019. 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
- Models
- A185F, 185B, 185C, 185E, 185D, 185, 185A
- Type certificates
- 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 5, 2026.