Airworthiness directives › 2009-10-08
AD 2009-10-08 Airworthiness Directives; Pratt & Whitney Models PW2037, PW2037(M), and PW2040 Turbofan Engines
Applicability*9
This AD applies to 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. These engines are installed on, but not limited to, Boeing 757-200 and 757-300 airplanes.
Compliance
You are responsible for having the actions required by this AD performed at the next HPT overhaul, unless the actions have already been done. Onetime Optical Comparator Inspection (OCI) of HPT 2nd Stage Hubs (f) Perform a onetime optical comparator inspection of the HPT 2nd stage hubs after a fluorescent penetrant inspection and all shop cleaning processes have been completed. Pratt & Whitney Alert Service Bulletin No. PW2000 A72-734, dated November 3, 2008, contains information about the optical comparator inspection. (g) Remove from service any hubs that fail the optical comparator inspection. Definition (h) This AD defines an HPT overhaul as when the HPT is at its piece-part level. Alternative Methods of
Unsafe condition
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.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1