SA185SO
Installation of B.F. Goodrich electric de-icers. (22D 30/6531A-15/6533-21). Held by Air Life Associates, INC, which holds 16 approved modifications in all. Last revised September 11, 1979. System: propeller.
What it applies to
- Kind of product
- Propeller
- Design holder
- Hamilton Standard Division
- Models
- 22D
- Type certificate
- P-736
- 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.