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

SA1970WE

Installation of 88 x 108-inch cargo pallet P/N 24545-51, -52, or -53 with net P/N 24550-51, -52, or -53 and 88 x 54-inch cargo pallet P/N 24546-51, -52, or -53 with net P/N 24551-51 or -52. Held by Aar, which holds 10 approved modifications in all. Last revised February 6, 1987. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
McDonnell Douglas Corporation; McDonnell Douglas Corporation
Models
DC-9-32F, DC-9-33F
Type certificates
A6WE, A6WE
On this site
Mcdonnell Douglas DC-9 93 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 7, 2026.