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

SA1708WE

Removal of cargo door (approved under STC SA995WE) to permit aircraft to engage in special operations such as aerial photography, parachute jumping, etc. Held by Southwestern Aero Exchange INC., which holds 23 approved modifications in all. Last revised March 20, 2007. System: emergency equipment.

What it applies to

Kind of product
Aircraft
Design holder
Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company
Models
Army AT-11, Navy SNB-1, C18S, C-45G, C-45H, D18S
Type certificates
A-2-582, A-2-582, A-757, A-765, A-765, A-765
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.