AD 92-19-02
Unsafe Condition
Reduced structural integrity of the lapjoints between stringers 16 and 17, and consequent decompression.
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Required Actions
Repair the lapjoints between stringers 16 and 17 (58 and 59) between frames 13345 and 14285 in accordance with Fokker Service Bulletin F28/53-121, Revision 1, dated December 13, 1991, following the specified schedules based on flight cycle accumulation.
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Compliance Time
Varies based on flight cycles: For post-SBF28/21-16 airplanes, repairs must be done before 32,000 flight cycles or within 35 months from 10/08/1992 (whichever is later) for those below 32,000 cycles; before 40,000 cycles or within 23 months for those between 32,000-40,000; within 11 months for those at or above 40,000. For pre-SBF28/21-16 airplanes, repairs must be done before 48,000 cycles or within 35 months (whichever is later) for those below 48,000; before 60,000 cycles or within 23 months for those between 48,000-60,000; within 11 months for those at or above 60,000.
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Affected Aircraft
Fokker Model F28 series airplanes with serial numbers 11003 through 11241, 11991, and 11992, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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