AD 2022-25-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | SAS | Airworthiness Directives; Airbus SAS Airplanes |
| aircraft | Bell | Various | Airworthiness Directives; Airbus SAS Airplanes |
| aircraft | Aviat | Various | Airworthiness Directives; Airbus SAS Airplanes |
Unsafe Condition
A loud noise and vibration in the belly fairing (BF) area above the wings was reported. The subsequent inspection revealed missing fasteners on the upper fastener line at the sewing angle attachment of the BF access panel 196ET. Further investigation determined that a shorter fastener and inappropriate self-locking nuts may have been used to install affected BF access panels on the final assembly line resulting in not enough threads of the collar engaged to ensure the locking capability.
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Required Actions
A one-time detailed inspection of the affected BF access panels for loose or missing fasteners, and a detailed inspection of the bolts attached to the sewing angle of the BF access panel to confirm that the chamfer length of the bolt is fully extended through the nut. Depending on the inspection results, accomplishment of applicable corrective actions including installing new or missing fasteners, applying torque, replacing bolts, and repair.
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Compliance Time
Before further flight
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Affected Aircraft
Airbus SAS Model A350-1041 airplanes with serial numbers specified in Airbus Service Bulletin A350-53-P073, dated June 9, 2022.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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