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Fri, May 15, 2009

AD: Pratt & Whitney

AD NUMBER: AD 2009-10-08

MANUFACTURER: Pratt & Whitney Models PW2037, PW2037(M), and PW2040 Turbofan Engines
SUBJECT: Airworthiness Directive AD 2009-10-08

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for Pratt & Whitney models PW2037, PW2037(M), and PW2040 turbofan engines with high-pressure turbine (HPT) 2nd stage hubs that have previously been exposed to Pratt & Whitney cleaning procedure SPOP 10 or SPOP 9 or equivalent procedure. This AD requires a onetime optical comparator inspection (OCI) of the blade retention slots of the affected HPT 2nd stage hubs at the next HPT overhaul after the effective date of the AD. This AD results from an uncontained release of HPT 2nd stage blades and blade retention lugs. We are issuing this AD to remove nonconforming HPT 2nd stage hubs, which could result in an uncontained release of turbine blades and blade retention lugs, and damage to the airplane.

FMI: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/FD616FE3D50C1333862575B5004E0EA4?OpenDocument

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