SA5940NM
Install an Allied Signal TPE331-1-151A, -151G, or -151K turboprop engine operated at TPE331-43-A ratings to replace the Garrett TPE331-43-A turboprop engine installed under STC No SA3071NM. Held by William F. Hubler, which holds 2 approved modifications in all. Last revised March 5, 1998. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Thrush Aircraft Inc.
- Models
- S-2R
- Type certificate
- A4SW
- On this site
- Thrush Aircraft Inc S-2 102 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.