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

ST00305SE-D

Installation of a VHF-900B 8.33 KHz spacing compatible Receiver Transmitter and Gables Control Panel into existing Boeing provisions. Held by Tass INC, which holds 96 approved modifications in all. Last revised April 27, 2012. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
—
Models
The Boeing Company737-700 Series
Type certificate
A16WE
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.