ST00286WI
Installation of an AlliedSignal Avionics CAS 66A traffic alert and collision avoidance system (TCAS I). Held by Duncan Aviation, INC, which holds 158 approved modifications in all. Last revised June 14, 1995. 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; The Cessna Aircraft Company
- Models
- 500, 560, S550, 550
- Type certificates
- A22CE, A22CE, A22CE, A22CE
- On this site
- Cessna 500 Citation I 62 registered
Cessna 550 Citation II 500 registered
Cessna 560 Citation V, Ultra, Encore and Excel 1,344 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 23, 2026.