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

SA1862SO

Installation of a cargo door per Universal Cargo Doors and Services Inc. master drawing list A92133-10, current revision. Held by Agro Air Associates, INC, which holds 2 approved modifications in all. Last revised May 4, 1994. System: airframe structure.

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; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation
Models
DC-8-50 Series, DC-8-32, DC-8-60 Series, DC-8-31, DC-8-52, DC-8-21, DC-8-63, DC-8-51, DC-8-53, DC-8-55, DC-8-61, DC-8-62
Type certificates
4A25, 4A25, 4A25, 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 21, 2026.