AD 90-23-13
Unsafe Condition
Loss of flight path control during automatic flight due to potential autopilot malfunctions.
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Required Actions
Incorporate AFM changes within 5 days, including deleting specified paragraphs and adding limitations; install placard in cockpit within 5 days; inspect autopilot servomotors within 14 days and replace if jumper wires are missing; remove AFM and placard changes after inspection/modification.
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Compliance Time
Within 5 days after the effective date of this AD (for AFM and placard actions), within 14 days after the effective date (for servomotor inspection), and prior to further flight if jumper wires are missing.
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Affected Aircraft
FOKKER Model F-28 Mark 0100 series airplanes with specified serial numbers: 11244 through 11286, 11289, 11291 through 11293, 11295, 11297, 11300, 11303, 11306, 11308, 11310, 11312, and 11314.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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