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

SA1072SW

Installation of Universal camera. Held by A D Howard JR, which holds 9 approved modifications in all. Last revised September 22, 1969. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Twin Commander Aircraft LLC; Twin Commander Aircraft LLC; Twin Commander Aircraft LLC; Twin Commander Aircraft LLC; Twin Commander Aircraft LLC; Twin Commander Aircraft LLC; Twin Commander Aircraft LLC; Twin Commander Aircraft LLC; Twin Commander Aircraft LLC; Twin Commander Aircraft LLC; Twin Commander Aircraft LLC
Models
500-A, 500-B, 500-S, 500-U, 500, 560-A, 560-E, 560-F, 680-E, 680-F, 680
Type certificates
6A1, 6A1, 6A1, 6A1, 6A1, 6A1, 6A1, 2A4, 2A4, 2A4, 2A4
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 20, 2026.