SH11PC
One Only STC, SN 0050: Installation of Lycoming HIO-360-A1A engine, engine exhaust system, and engine cooling system as removed form Hughes Model 269B. Held by Murrayalr LTD.. Last revised April 21, 1971. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Schweizer Aircraft Corporation
- Models
- 269A
- Type certificate
- 4H12
- On this site
- Schweizer 269 300 series helicopters 212 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.