AD 98-12-26
Unsafe Condition
Loss of the coupling fitting attachment bolts between the center wing section and the fuselage, leading to reduced structural integrity of the airplane.
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Required Actions
Perform a one-time inspection to determine torque values of the coupling fitting attachment bolts at fuselage station 10790 per Fokker Service Bulletin F28/53-143. If torque values are outside specified limits, re-torque the bolts prior to further flight.
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Compliance Time
Within 3,000 flight cycles or 1 year after the effective date of this AD, whichever occurs later
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Affected Aircraft
Fokker Model F.28 Mark 1000, 2000, 3000, and 4000 series airplanes; serial numbers 11003 through 11201 inclusive, 11991, and 11992; on which Fokker Service Bulletin F28/53-125 has been accomplished.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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