AD 2005-11-05
Unsafe Condition
Failure or malfunction of the standby vacuum system (SVS) during instrument flight rules (IFR) flight can lead to pilot disorientation and loss of control of the aircraft.
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Required Actions
Replace the airplane flight manual supplement (AFMS) in the airplane flight manual with the appropriate revision and install placards as defined in the AFMS. Upgrade the Model SVS I or SVS IA SVS to the Model VI SVS. Add the instructions for continued airworthiness (ICA) to the maintenance schedule for the aircraft.
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Compliance Time
Before further flight
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Affected Aircraft
All airplanes equipped with Precise Flight, Inc. Models SVS I and SVS IA standby vacuum systems installed under certain supplemental type certificates or through field approval.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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