AD 98-03-18
Unsafe Condition
Failures of the emergency DC/AC bus power supply could reduce the ability of the flightcrew to control the airplane.
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Required Actions
Revise the Airplane Flight Manual (AFM) to include information to identify failures of the emergency DC/AC bus power supply and take corrective actions. Install a new terminating modification for the existing AFM revisions. Revise the AFM to inform flightcrew about the 'EMER DC BUS' warning on the multi-function display unit (MFDU) and take appropriate actions.
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Compliance Time
before further flight
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Affected Aircraft
Fokker Model F28 Mark 0100 and 0070 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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