SR00252LA
Installation of a Lycoming T53-L-13BA engine in a Western Int'l Aviation, Inc. helicopter. Limited to installation on UH-1P, S/N 63-13163 ONLY. Held by Wsh, LLC, which holds 7 approved modifications in all. Last revised June 11, 2026. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Bell Helicopter Textron
- Models
- UH-1P
- Type certificate
- H12NM
- On this site
- Bell UH-1 Huey (Iroquois) 404 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 7, 2026.