SA2333WE

Provides for the interchangeability and installation of door mounted inflatable emergency slides in accordance with FAA Approved United Air Lines Drawing No. 15F-4593. Held by United Airlines INC, which holds 520 approved modifications in all. Last revised November 30, 2011. System: airframe structure.

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; The Boeing Company
Models: DC-8-51, DC-8-52, DC-8-53, DC-8-55, DC-8-61, DC-8-62
Type certificates: 4A25, 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 21, 2026.