SA906WE

Modification of R. H. forward lounge as described by United Air Lines Approved Drawing List No. COA 2-2450 dated March 4, 1965, or later FAA approved revisions. Held by United Airlines INC, which holds 520 approved modifications in all. Last revised November 30, 2011. System: other and general.

What it applies to

Kind of product: Aircraft
Design holder: The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company
Models: DC-8-11, DC-8-12, DC-8-21, DC-8-51, DC-8-52
Type certificates: 4A25, 4A25, 4A25, 4A25, 4A25
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.