SA2020WE
Installation of Wright R-975-11 engine, Hamilton Standard 2D30-6101A-12 propeller, and associated items. Held by Trinkle and Boys. Last revised October 8, 1969. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Boeing Airplane Company Wichita Division
- Models
- A75N1 (Army PT-17; -17A; Navy N2S-1; -4)
- Type certificate
- A-743
- On this site
- Boeing A75 Stearman Kaydet 979 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 21, 2026.