Airworthiness Directive 2000-22-01
one-timeAirworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines
What this AD requires
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Pratt & Whitney (PW) PW4000 series turbofan engines that are equipped with the high pressure compressor (HPC) cutback stator (CBS) configuration and that are used on Boeing 747, Boeing 767, and McDonnell Douglas MD-11 series airplanes. This action requires Operators to limit the number of engines with the HPC CBS configuration to one per airplane, and prohibits installation of engines with HPC modules modified after the effective date of this AD to incorporate the HPC CBS configuration. This amendment is prompted by reports of HPC surges in engines that have the HPC CBS configuration. The actions specified in this AD are intended to prevent a multiple- engine power loss due to HPC surges, which could result in engine power loss at a critical phase of flight such as takeoff or climb.
Which aircraft AD 2000-22-01 applies to
Applies to engines with HPC (high-pressure compressor) CBS configuration. Number of HPC CBS engines per airplane limited to one within 100 cycles-in-service of the AD effective date or specified cyclic limits (390 CSN/CSO for two-engine airplanes, 340 for three-engine, 305 for four-engine), whichever is later, with a narrow exception allowing two HPC CBS engines under specified low-cycle conditions. HPC modules modified per PW SB PW4ENG 72-706 (Rev 3 or earlier) or PW4ENG 72-711 after the AD effective date are not eligible for installation on an airplane.
Whether AD 2000-22-01 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.