SA1365GL
Surrendered and incorporated into STC ST334CH. Held by Cooper Aviation Supply Company, INC., which holds 79 approved modifications in all. Last revised June 14, 2002. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation
- Models
- C54B-DC (Army C-54B), C54G-DC (Navy R5D-5), C54G-DC (Army C-54G), C54E-DC (Navy R5D-4), C54E-DC (Army C-54E), DC-4, C54D-DC (Navy R5D-3), C54A-DC (Navy R5D-1), C54A-DC (Army C-54A), C54-DC (Navy R5D), C54-DC (Army C-54), C54D-DC (Army C-54D), C54B-DC (Navy R5D-2)
- Type certificates
- A-762, A-762, A-762, A-762, A-762, A-762, A-762, A-762, A-762, A-762, A-762, A-762, A-762
- On this site
- Douglas C-54 7 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.