AD 71-25-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus SAS | BAC 1-11 200 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 200 and 400 Series Airplanes |
| aircraft | Airbus SAS | BAC 1-11 400 Series | Airworthiness Directives; BRITISH AIRCRAFT CORPORATION Model BAC 1-11 200 and 400 Series Airplanes |
Unsafe Condition
Failures of the flap beam bracket to wing attachments due to loose or failed attachment bolts through the wing lower skin at flap beam locations 2, 3, or 4.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect flap beam bracket attachment bolts for looseness or failure at specified intervals. Replace failed or loose bolts with new taper bolts or parallel shank bolts meeting specified material strength. Install BAC Modification PM 4790(c) parallel shank bolts as per Service Bulletin 57-PM 4790. Inspect brackets for cracks and wing structure for damage/fuel leaks, and repair as necessary.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 50 landings after the effective date of this AD, unless already accomplished within specified prior landings, and thereafter at intervals not exceeding 500 or 1,000 landings as specified.
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Affected Aircraft
British Aircraft Corporation Model BAC 1-11 200 and 400 Series airplanes without parallel shank bolts or specific BAC Modifications (PM 3065, PM 4407, PM 4790) incorporated at flap beam locations 2, 3, or 4.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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