Airworthiness Directive 2010-16-12
one-timeAirworthiness Directives; The Boeing Company Model 777-200LR and -300ER Series Airplanes Equipped with GE90-100 Series Engines
What this AD requires
We are adopting a new airworthiness directive (AD) for certain Model 777-200LR and -300ER series airplanes equipped with GE90-100 series engines. This AD requires replacing the insulation blanket fasteners of the lower aft cowl of the thrust reverser. This AD also requires inspecting the oil scavenge tube on the turbine rear frame of the engine for damage, and replacement if necessary. This AD results from a determination of insufficient clearance and subsequent interference between the oil scavenge tube on the turbine rear frame of the engine and the bolt on the aft cowl insulation blanket of the thrust reverser. We are issuing this AD to prevent damage and possible puncture of the oil scavenge tube and consequent oil loss, which could result in an in-flight shutdown of the engine.
Which aircraft AD 2010-16-12 applies to
Applies to airplanes certificated in any category, as identified in Boeing Alert Service Bulletin 777-78A0070, dated November 20, 2008 (oil scavenge tube/aft cowl insulation blanket bolt clearance on the engine turbine rear frame).
Whether AD 2010-16-12 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.