AD 82-16-04 R1
Unsafe Condition
Interference of control rod with idler lever and access panel in leading edge of aileron, possible jamming of the aileron de-coupler, fatigue failure of connection rod between summing bar and servo valve, restricted aileron control due to freeze-up of the aileron feel/trim spring unit, and escape of balls from worn ball return tube in wing flap actuator.
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Required Actions
Inspect and rectify control rod interference per Fokker SB F28/27-22, inspect and modify aileron de-coupler per SB F28/27-32, inspect connection rod lubrication per SB F-28/27-82A, modify aileron feel/trim spring unit per SB F28/27-92, and inspect and replace ball return tubes per SB F28/27-137.
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Compliance Time
Within the next 100 hours time in service, 1,000 hours time in service or 500 flights (whichever occurs first), 500 hours time in service, 300 hours time in service, and 1,000 hours time in service for Part I and 3,000 hours time in service for Part II.
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Affected Aircraft
FOKKER B.V. Model F28 Series 1000 and 4000 airplanes with serial numbers 11003 through 11162, 11991 through 11994, and specific part numbers as listed in the referenced service bulletins.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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