SA3185WE
New enlarged 12 ft cargo door, new cargo floor, structural cargo crash barrier, mod FS 260 bulkhead, relocated main elec junction box, partially new DC elec distribution and control system, DC-6 wheels and brakes, misc changes for cargo operations. Held by Consulting Aerospace Engineers INC, which holds 5 approved modifications in all. Last revised May 28, 1980. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company
- Models
- C54B-DC
- Type certificate
- A-762
- 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 7, 2026.