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

SA2126CE

Installation of special avionics package consisting of: Bendix EFS-10 Electronic Flight Instrument System (5 tube), Bendix navigation and communication radios, Bendix RDS-86 radar, Litton LTN-3100 navigation system, Bendix radar altimeter, King KHF-950 HF transceiver, Global GNS-1000 flight management system, 3M (Ryan) WX-11J stormscope, and Wulfsberg Flitefone VI. Held by Textron Aviation INC., which holds 68 approved modifications in all. Last revised March 9, 2018. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
Textron Aviation Inc.
Models
S550
Type certificate
A22CE
On this site
Cessna S550 94 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 20, 2026.