80-20-06: KFC-200 Flight Control System Modification Under STC SA1246CE
FAA order 80-20-06 is an airworthiness directive in force since October 14, 1980. The FAA's subject line: KFC-200 Flight Control System Modification Under STC SA1246CE. It names Cessna 421 Golden Eagle: about 768 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: flight controls.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Cessna Aircraft Company
- Models
- 421C
- On this site
- Cessna 421 Golden Eagle 768 registered
Dates and paperwork
- In force since
- October 14, 1980
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (1,175 characters)
80-20-06 CESSNA: Amendment 39-3937. Applies to Model 421C airplanes (Serial Number 421C0401 and on) having King KFC-200 Flight Control System installed under Supplemental Type Certificate SA1246CE.
COMPLIANCE: Required as indicated unless already accomplished.
To prevent the airplane from exceeding 60 degrees bank angle in the event of a roll axis hard-over malfunction, accomplish the following:
A) Within the next 25 hours time-in-service after the effective date of this AD, reset the KFC-200 roll axis slip clutch from 60 plus or minus 6 inch-pounds to 38 plus or minus 4 inch-pounds in accordance with the instructions contained in King Radio Service Sales Installation Bulletin No. 167 dated August 4, 1980.
B) Airplanes may be flown in accordance with FAR 21.197 to a location where the maintenance required by this AD may be performed provided the autopilot is inoperative.
C) Any equivalent method of compliance must be approved by the Chief, Aircraft Certification Program, Federal Aviation Administration, Room 238, Terminal Building No. 2299, Mid-Continent Airport, Wichita, Kansas 67209.
This amendment becomes effective October 14, 1980.
Related safety bulletins advice on the same designs, not orders
2015-09-23CE-14-11R1 · Landing Gear; Nose Landing Gear Trunnions
2014-05-30CE-14-19 · Landing Gear; Main Landing Gear (MLG) Torque Link
2014-02-25CE-14-11 · Landing Gear; Nose Landing Gear Trunnions
2013-03-13CE-13-22 · Electrical Power System Circuit Breaker Switch
2011-09-27CE-11-29R1 · Flight Control System
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/80-20-06.json · aircraft systems.