AD 98-17-08
Unsafe Condition
Ineffective or absent sealwires in the fireguards of the engine fire shut-off system could result in in-flight engine shutdown due to inadvertent closure of the fire shut-off valves.
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Required Actions
Within 30 days after the effective date, inspect the engine fire shut-off system sealwire for discrepancies per Part I of Fokker Service Bulletin F28/76-20. Repair any discrepancies before further flight. Repeat inspections at intervals not exceeding 3,000 flight hours.
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Compliance Time
Within 30 days after the effective date of this AD, and thereafter at intervals not to exceed 3,000 flight hours.
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Affected Aircraft
Fokker Model F.28 Mark 1000, 2000, 3000, and 4000 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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