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

SA2128SW-AC

Installation of Strap Modules in Bendix/King KDC-481T air data computers. Held by Federal Aviation Administration, which holds 17 approved modifications in all. Last revised May 10, 1996. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Raytheon Aircraft Company
Models
300
Type certificate
A24CE
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.