SA1669NM
Installation of a PRatt and Whitney R-985-14B engine; a Hamilton Standard 2D30/6101-12 propeller; upper and lower ailerons; Serv-Aero typye oil system with flop tube; a 6 gallon fuselage header fuel tank with flop tube; and a smoke tank system. Held by William C. Warren, which holds 2 approved modifications in all. Last revised July 2, 1982. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- —
- Models
- Boeing Airplane Company, Wichita DivisionA75N1 (Army PT-17, -17A, Navy N2S-1, -4)
- Type certificate
- A-743
- 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 22, 2026.