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

ST01605CH

Installation of an Allied Signal CAS-67A TCAS II Traffic Alert and Collision Avoidance System in accordance with Pro-Tech Avionics Corporation Master Drawing List Document No. 81-328L001, Revision E, dated December 6, 2001, or later FAA approved revision. Held by Phoenix Air Group INC, which holds 9 approved modifications in all. Last revised January 14, 2002. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Gulfstream Aerospace Corporation
Models
G-159
Type certificate
1A17
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.