AD 80-20-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 421C | Airworthiness Directives; Cessna Model 421C Airplanes |
Unsafe Condition
The KFC-200 Flight Control System's roll axis hard-over malfunction could cause the airplane to exceed 60 degrees bank angle.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Reset the KFC-200 roll axis slip clutch to 38 ±4 inch-pounds within 25 hours time-in-service after the AD's effective date. Use King Radio Service Sales Installation Bulletin No. 167. If the autopilot is inoperative, airplanes may be flown under FAR 21.197 to a maintenance location.
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Compliance Time
within the next 25 hours time-in-service after the effective date of this AD
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Affected Aircraft
Cessna Model 421C airplanes (Serial Number 421C0401 and on) with King KFC-200 Flight Control System installed under STC SA1246CE
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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