SA37PC
ONE ONLY STC, SN 4926: Modification of floor decking and cabin interior; addition of seat tracks, right side emergency exit windows, flight equipment and engineering corp seats, and Beltmaster's seatbelts. Held by Tropic Air LTD (New Zealand). Last revised May 13, 1981. System: emergency equipment.
What it applies to
- Kind of product
- Aircraft
- Design holder
- McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation
- Models
- DC3C-S1C3G, DC3C-S4C4G, DC3C-SC3G
- Type certificates
- A-669, A-669, 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.