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

ST01169NY

Installationof an Allied Signal CAS-76A TCAS II and dual MST-67A Mode S Transponders. Held by Western Avionics (Canada), which holds 24 approved modifications in all. Last revised February 15, 2000. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Bombardier-Rotax GmbH; Bombardier-Rotax GmbH; Bombardier-Rotax GmbH
Models
DHC-8-200 Series, DHC-8-300 Series, DHC-8-100 Series
Type certificates
A13NM, A13NM, A13NM
On this site
Bombardier DHC-8 Dash 8 and Q400 58 registered
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.