SA2622WE
Installation of Pratt & Whitney R-985-39, -39A, -AN-1, -AN-3, or -AN14BM1 engine and Hamilton Standard 2D30/6101A-15 or -21 propeller. (V-77 (ARMY AT-19) Landplane only, normal category). Held by Serv-Aero Engineering INC, which holds 32 approved modifications in all. Last revised December 13, 1972. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Consolidated Vultee Aircraft Corporation Stinson Division
- Models
- V-77 (Army AT-19)
- Type certificate
- A-774
- 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.