AD 90-09-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 767-200 Series | Airworthiness Directives; BOEING Model 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300 Series | Airworthiness Directives; BOEING Model 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300F Series | Airworthiness Directives; BOEING Model 767 Series Airplanes |
Unsafe Condition
Unacceptable asymmetric slat deployment due to torque tube damage, improper coupling installation, or missing screws and lockwiring on the leading edge slat drive mechanism.
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Required Actions
Conduct a one-time inspection of the leading edge slat drive mechanism within 20 days after the effective date to check for torque tube damage, proper coupling installation, and presence of screws and lockwiring. Repair discrepancies prior to further flight. Submit a report within 10 days of inspection completion to the Seattle Aircraft Certification Office.
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Compliance Time
Within the next 20 days after the effective date of this AD
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Affected Aircraft
All model 767 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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