AD 77-13-13
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
Failure of the whiffletree lever, part number CH504-009, could result in loss of rudder feel capability.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 80 landings after the effective date, visually inspect the whiffletree lever for defects like transverse grooves, notches, or undercuts. If defects are found, within 25 landings test and inspect for cracks. Replace the lever before further flight if cracks are found, or within 250 landings if no cracks. For Lucas repair kit levers, replace bolts with rivets at next overhaul.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 80 landings after the effective date of this AD
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Affected Aircraft
British Aircraft Corporation Model BAC 1-11 200 and 400 Series airplanes certificated in all categories.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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