ST01551CH-D
Installation of a Honeywell/AlliedSignal Mark VIII Enhanced Ground Proximity Warning System. Held by Electrosonics, which holds 76 approved modifications in all. Last revised November 16, 2001. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company
- Models
- 500, S550, 550
- 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 7, 2026.