The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · issued

SA4198WE

Forward and rear cargo door latch assembly, P/N TAS-3361150, and fitting installation, P/N TAS05359955-8002. Held by Time Avn Services, INC. Last revised August 5, 1980. System: airframe structure.

What it applies to

Kind of product
Aircraft
Design holder
McDonnell Douglas Corporation; McDonnell Douglas Corporation
Models
DC-6A (USAF C-118A), DC-6A (Navy R6D-1)
Type certificates
6A3, 6A3
On this site
Douglas DC-6 17 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 22, 2026.