AD 80-09-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 500 | Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes |
| aircraft | Cessna Aircraft Company | 501 | Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes |
| aircraft | Cessna Aircraft Company | 550 | Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes |
| aircraft | Cessna Aircraft Company | 551 | Airworthiness Directives; CESSNA Models 500, 501, 550 and 551 Airplanes |
Unsafe Condition
Loss of attitude information to the crew due to insufficient power sources, distribution, or bus systems for the dual flight director installation, or improper placement of the copilot's second attitude indicator.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Insert specified operating limitations in the Airplane Flight Manual, relocate the copilot's second attitude indicator to designated panel positions, and use the insertion until replaced by FAA-approved revisions. Equivalent methods require approval from the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 100 hours time-in-service after the effective date of this AD
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Affected Aircraft
Cessna Models 500, 501, 550, and 551 with serial numbers as listed in the AD, equipped with Cessna-installed dual flight director indicators not modified for independent power sources or relocated indicators.
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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