AD 87-07-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus SAS | BAC 1-11 200 Series | Airworthiness Directives; BRITISH AEROSPACE Model BAC 1- 11 200 and 400 Series Airplanes |
| aircraft | Airbus SAS | BAC 1-11 400 Series | Airworthiness Directives; BRITISH AEROSPACE Model BAC 1- 11 200 and 400 Series Airplanes |
Unsafe Condition
Failure of the keel structure to carry design loads due to structural crack propagation in the keel beam lateral diaphragm.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect, repair or replace the keel beam lateral diaphragm assembly per BAC 1-11 Alert Service Bulletin 53-A-PM5918. Repeat the inspection at intervals not exceeding 3,600 landings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to the accumulation of 12,000 landings, or within the next 1,500 landings after the effective date of this AD, whichever occurs later.
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Affected Aircraft
British Aerospace Model BAC 1-11 200 and 400 series airplanes, 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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