AD 98-04-50
Unsafe Condition
Possible ignition hazard due to accumulation of water and fuel between the front spar and auxiliary spar, which could result in increased risk of an in-flight fire.
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Required Actions
Modify the wing leading edge torsion box in accordance with Fokker Service Bulletin SBF100-57-034 within 12 months after the effective date of this AD. An alternative method of compliance or adjustment of the compliance time may be approved if it provides an acceptable level of safety.
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Compliance Time
Within 12 months after the effective date of this AD
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Affected Aircraft
Fokker Model F.28 Mark 0070 and F.28 Mark 0100 series airplanes, all serial numbers.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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