Airworthiness Directive 2000-17-06
recurringAirworthiness Directives; Boeing Model 747 and 767 Series Airplanes Equipped With General Electric CF6-80C2 Series Engines
What this AD requires
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747 and 767 series airplanes, that requires repetitive functional tests of the directional pilot valve (DPV) of the thrust reversers to detect pneumatic leakage, and corrective action, if necessary. This amendment is prompted by a report of a latent failure mode of the fail-safe features of the thrust reverser system identified as possible leakage of the DPV that is due to a poppet being jammed slightly open or a leaking o-ring. The actions specified by this AD are intended to ensure the integrity of the fail- safe features of the thrust reverser system by preventing possible failure modes, which could result in inadvertent deployment of a thrust reverser during flight, and consequent reduced controllability of the airplane.
Which aircraft AD 2000-17-06 applies to
Functional test of the thrust reverser directional pilot valve (DPV) for pneumatic leakage per Boeing Alert SB 747-78A2170 or SB 767-78-0084 (both dated October 21, 1999), applicable to Model 747 and 767 series airplanes. For thrust reversers NOT modified per SB 747-78-2151 or 767-78-0063 (or production equivalent): initial test within 60 days, repeat every 1,000 flight hours. For thrust reversers modified per those SBs (or production equivalent): initial test within 180 days, repeat every 6,000 flight hours.
Whether AD 2000-17-06 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.