AD 2016-07-25
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
The ram air turbine (RAT) assembly may fail to operate if deployed at low airspeeds. The volume fuse on the RAT assembly may be activated in-flight before the RAT is deployed, leading to improper pump hydraulic pressure offloading when the RAT is needed.
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Required Actions
Replace either the RAT pump and control module assembly or the entire RAT assembly. Perform an installation test and take corrective actions if necessary.
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Compliance Time
Within 36 months of the effective date (May 18, 2016).
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Affected Aircraft
The Boeing Company Model 787-8 airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin B787-81205-SB290015-00, Issue 002, dated November 25, 2014.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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