SA2221NM
Installation of Pratt & Whitney of Canada PT6A-45R engines, Hartzell HC-B5MP-3C/M1086B propellers, and associated modifications to engine mounting, nacelle, fuselage, wings empennage, accessories & systems, in accordance with FAA sealed United States Aircraft Drawing List No. 1001, Revision "P" or later FAA approved revisions. United States Aircraft Corporation FAA approved Airplane Flight Manual Report 0046, dated Decmeber 1, 1983, or later FAA approved revisions for USAC Model DC3-TP is required as part of this installation. Held by United States Aircraft Corporation. Last revised November 18, 1984. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company
- Models
- DC3C-R-1830-90C
- Type certificate
- A-669
- On this site
- Douglas DC-3 155 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.