SA3210NM
Installation of Lycoming IO-360-A1B6 engine with a McCauley B2D34C214/90DHB-16 propeller S/N 17267518; N73509. Held by Gary Serwe. Last revised December 11, 1985. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Textron Aviation Inc.
- Models
- 172M
- Type certificate
- 3A12
- On this site
- Cessna 172 Skyhawk 20,675 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 22, 2026.