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

SA3235NM

Installation of dual Sperry EDZ-601/603 Electonic Flight Instrument Systems. Held by Honeywell International INC, which holds 599 approved modifications in all. Last revised March 20, 2020. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Textron Aviation Inc.
Models
200
Type certificate
A24CE
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.