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

SA1435GL

Installation of ABEX hydraulic pumps, P/N 57155, in rudder, spoilers and auxiliary systems. Held by Abex/Nwl Aerospace. Last revised January 18, 1994. System: flight controls.

What it applies to

Kind of product
Aircraft
Design holder
Alliance Aircraft Group LLC; 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
Argo, DC-8-62, DC-8-61, DC-8-62F, DC-8-63, DC-8-63F, DC-8-71, DC-8-72, DC-8-72F, DC-8-73F, DC-8-73
Type certificates
ATC 178, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25
On this site
Amor Fati Industries ARGO 50 registered
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 12, 2026.