SA1405WE
Structural installation of Dorne and Margolin DMC 33-2 Satcom VHF radio antenna. Held by United Air Lines INC, which holds 27 approved modifications in all. Last revised June 6, 2009. System: instruments and avionics.
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
- Models
- DC-8-52, DC-8-31, DC-8-32, DC-8-33, DC-8-51, DC-8-53, DC-8F-55, DC-8-21, DC-8F-54
- Type certificates
- 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25
- On this site
- Douglas DC-8 6 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 8, 2026.