SA749CE
Installation of Hartzell propeller model HC-C2YK-1BF/F7666A or HC-C2YK-1A/7666A. Held by Williams Barbara. Last revised March 11, 1982. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Cessna Aircraft Company; The Cessna Aircraft Company
- Models
- 170A, 170B
- Type certificates
- A-799, A-799
- On this site
- Cessna 170 2,085 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.