AD 2012-07-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Fokker | Services B | Airworthiness Directives; Fokker Services B.V. Airplanes |
Unsafe Condition
Cracking in the lap joint of the rear fuselage, specifically at a skin cut-out for a water service panel, due to high local loads, can lead to exponential crack growth and failure of the lap joint over a certain length, resulting in in-flight decompression.
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Required Actions
Perform a low frequency eddy current (LFEC) inspection for cracks of the lap joint of the rear fuselage, in accordance with Fokker Service Bulletin SBF50-53-061. Repair the lap joint if cracks are found. Send an inspection report to the type certificate holder, even if no cracks are found, to confirm the selected inspection threshold and interval.
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Compliance Time
Within 3 months for airplanes with 47,000 or more flight cycles; within 6 months for airplanes with 46,000 to 47,000 flight cycles; compliance time for airplanes with 45,000 to 46,000 flight cycles is not specified in the provided text.
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Affected Aircraft
Fokker Services B.V. Model F.27 Mark 050 airplanes, serial numbers 20103 through 20252, 20254 through 20267, 20270 through 20279, 20281, 20283 through 20286, 20288 through 20317, 20328, 20331, 20333, and 20335, except those modified per Fokker Service Bulletin SBF50-53-062.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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