Airworthiness Directive 2002-07-04
one-timeAirworthiness Directives; Pratt & Whitney JT9D-7R4 Series Turbofan Engines
What this AD requires
This amendment adopts a new airworthiness directive (AD), that is applicable to Pratt & Whitney (PW) JT9D-7R4 series turbofan engines. This amendment requires a one-time inspection of low pressure turbine (LPT) 5th stage disks for evidence of blend repairs and mechanical damage, and replacement of the affected disks based on the extent of those repairs and damage. This amendment is prompted by a report of a PW JT9D-7R4G2 turbofan engine that experienced an uncontained failure of the LPT 5th stage disk. The actions specified by this AD are intended to prevent uncontained failure of the LPT 5th stage disk, due to incomplete blend repairs, resulting in in-flight shutdown and damage to the airplane.
Which aircraft AD 2002-07-04 applies to
Boilerplate applicability only; specific JT9D-7R4 variant list precedes this excerpt and is not included. Requires a one-time visual inspection for incomplete blend repairs on LPT 5th stage disks P/N 787905, 787905-001, and 798305 per PW SB JT9D-7R4-72-574 (Rev 1 or Rev 2), performed at the next LPT-module-from-engine separation; disks with tiebolt-fracture damage or five-or-more blend-repair areas must be removed from service, to prevent uncontained LPT 5th stage disk failure.
Whether AD 2002-07-04 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.