SA1686GL
Installation of a Bendix/King EFS-50 electronic flight instrument system(EFIS) comprised of 2 ED-551A electronic flight displays, P/N 066-03137-3300; one SG-465 symbol generator, P/N 066-04021-1107; one CP-467 display controller, P/N 71-00439-3200; one KA-163A adapter, P/N 071-01303-0001; and a Bendix/King weather radar comprised of one RS-181A weather radar RTA, P/N 071-01315-0030 and one IN-182A weather radar indicator, P/N 066-03084-0031. Held by Electrosonics Div of Airadio Corporation, which holds 53 approved modifications in all. Last revised December 15, 1993. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Cessna Aircraft Company; The Cessna Aircraft Company
- Models
- 501, 551
- Type certificates
- A27CE, A27CE
- On this site
- Cessna 501 Citation I/SP 189 registered
Cessna 551 34 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.