AD 2019-06-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Hydraulic leakage in aileron and elevator power control units (PCUs) caused by damage from lightning strikes, which could result in an inability to maintain aileron or elevator actuator stiffness and lead to airplane control surface oscillations, reduced controllability of the airplane.
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Required Actions
Inspect for certain parts, detailed inspections of aileron and elevator PCUs, and applicable on-condition actions, including replacement of affected PCUs, and reporting of discrepant findings.
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Compliance Time
Within 60 days after the inspection or records check.
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Affected Aircraft
All The Boeing Company Model 787 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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