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

SA00248WI-D

Installation of Bendix/King KLN 90B Global Positioning System (GPS) for IFR enroute and approach operation. For serial numbers TH-1752 and above. Held by Honeywell International INC, which holds 599 approved modifications in all. Last revised April 15, 2020. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Textron Aviation Inc.; Textron Aviation Inc.
Models
58, 58A
Type certificates
3A16, 3A16
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.