AD 2015-17-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Blocked drain lines at the engine forward strut that cause flammable fluid to accumulate in a flammable leakage zone.
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Required Actions
Repetitive functional checks for blockage of the forward strut drain line and doing corrective actions if necessary, including cleaning or replacing any blocked drain lines. A one-time cleaning of certain forward strut drain lines is also required. Optional replacement of the drain lines and installation of insulation blankets, along with a revision of the maintenance or inspection program, is provided as an alternative terminating action.
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Compliance Time
Within 12 months of the effective date (October 7, 2015).
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Affected Aircraft
The Boeing Company Model 777-200 and -300 series airplanes equipped with Pratt and Whitney engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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