SA00261SE
Installation of Lycoming O-320-E2D engines modified by STC SE00252SE, O-320-D2G or O-320-D2J engine and McCauley 1C160/CTM 7557 or 1C160/DTM 7557 or 1A175/ETM (seaplane only) propeller. (Landplanes and Seaplanes). Held by Ly-Con Rebuilding Company, which holds 8 approved modifications in all. Last revised December 3, 1998. 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
- Models
- 172I, 172K, 172L, 172M
- Type certificates
- 3A12, 3A12, 3A12, 3A12
- On this site
- Cessna 172 Skyhawk 20,676 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.