SA04433CH
Installation of a Pratt & Whitney model R985-AN-148 engine with a Hamilton Standard model 6167A-12 propeller in accordance with the I nsta llation Instructions in Rare Aircrafl Ltd, Document Number 770, Rev. IR, dated February 8. 2019 or later FAA approved revision. Held by Rare Aircraft LTD, which holds 10 approved modifications in all. Last revised October 28, 2019. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Consolidated Vultee Aircraft Corporation Stinson Division ATC
- Models
- SR-9C (Army UC-81C)
- Type certificate
- 621
- 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 5, 2026.