SA2302CE
Installation of Bendix MLS-21 microwave landing system receiver. Held by Msi, which holds 19 approved modifications in all. Last revised November 4, 1987. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Cessna Aircraft Company; The Cessna Aircraft Company
- Models
- 425, 421C
- Type certificates
- A7CE, A7CE
- On this site
- Cessna 421 Golden Eagle 769 registered
Cessna 425 Conquest I 161 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 22, 2026.