STC SA4-328

Supplemental type certificate · National Aircraft Corp

Holder
National Aircraft Corp · United States
Status
Current · Issued
Status date
January 1, 1960
Product
Aircraft · Large Multi-Engine
Certification basis
Part 21

From FAA DRS. DRS record last changed December 6, 2025.

What it approves

Step kit added to fore and aft cargo door.

ADs that name this STC · 0

An AD can apply because an STC is installed, or mention one in its text.

No AD in this release names this STC

Approved models · 4

MakeModelData sheet
McDonnell Douglas CorporationDC-6A-781
McDonnell Douglas CorporationDC-6 Series6A3
McDonnell Douglas CorporationDC-6B (Navy R6D-1Z)6A4
McDonnell Douglas CorporationDC-7 Series4A10