ST00932WI

Installation of a Universal Avionics Terrain Awareness and Warning System (TAWS) using Duncan Aviation Document List No. 10055100, Rev A, dtd 12/14/00; Duncan Aviation Document No. 40010400, FAA Approved AFM Supplement dtd 12/18/00; or later FAA approved revisions. Held by Duncan Aviation, INC, which holds 158 approved modifications in all. Last revised December 18, 2000. System: instruments and avionics.

What it applies to

Kind of product: Aircraft
Design holder: Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.
Models: Learjet 31, Learjet 35, Learjet 35A (C-21A), Learjet 36, Learjet 36A
Type certificates: A10CE, A10CE, A10CE, A10CE, A10CE
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 20, 2026.