AD 67-28-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus SAS | BAC 1-11 200 Series | Airworthiness Directives; BRITISH AIRCRAFT Model BAC 1-11, 200 and 400 Series Airplanes |
| aircraft | Airbus SAS | BAC 1-11 400 Series | Airworthiness Directives; BRITISH AIRCRAFT Model BAC 1-11, 200 and 400 Series Airplanes |
Unsafe Condition
Deterioration of the secondary flap transmission system due to corrosion in the magnesium bearing housings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect support bearings in the flap secondary transmission shafting for corrosion or stiffness per BAC 1-11 Alert Service Bulletin No. 27-A-PM 2757 or equivalent. If corrosion or stiffness found, remove and dismantle the bearing assembly to inspect the interior. Replace bearing housing before further flight with an unused magnesium or aluminum alloy housing per BAC 1-11 Service Bulletin No. 27-PM 2757 or equivalent.
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Compliance Time
Within the next 250 hours' time in service after the effective date for airplanes with 2,750+ hours' time in service, or before 3,000 hours' time in service for those with less than 2,750 hours. Thereafter, inspections every 600 hours' time in service. After corrective actions per (b), subsequent inspections may be extended to 3,000 hours' time in service.
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Affected Aircraft
British Aircraft Model BAC 1-11, 200 and 400 Series airplanes.
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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