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

SA02115CH

Installation of a dual Shadin ADC-6000 Air Data Computer System. Held by Shadin Company INC, which holds 31 approved modifications in all. Last revised March 7, 2005. System: instruments and avionics.

What it applies to

Kind of product
Aircraft
Design holder
The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company
Models
500, 550, S550
Type certificates
A22CE, A22CE, A22CE
On this site
Cessna 500 Citation I 63 registered
Cessna 550 Citation II 500 registered
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 5, 2026.