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

ST09326SC

Installation of dual Universal Navigation UNS-1C flight management system. Held by Advanced Avionics Technologies, which holds 9 approved modifications in all. Last revised November 14, 2000. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
De Havilland Aircraft of Canada Limited; De Havilland Aircraft of Canada Limited
Models
DHC-8-201, DHC-8-202
Type certificates
A13NM, A13NM
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.