Airworthiness directives › 2019-19-11
AD 2019-19-11 Airworthiness Directives; Pratt & Whitney Turbofan Engines
Models named: PW1519G, PW1521G, PW1521GA, PW1524G, PW1525G, PW1521G-3, PW1524G-3, PW1525G-3, PW1919G, PW1921G. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Pratt & Whitney Models PW1519G, PW1521G, PW1521GA, PW1524G, PW1525G, PW1521G-3, PW1524G-3, PW1525G-3, PW1919G, PW1921G, PW1922G, PW1923G, and PW1923G-A turbofan engines that have accumulated fewer than 300 flight cycles.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 50 flight cycles from the effective date of this AD, and thereafter at intervals not to exceed 50 flight cycles until the engine accumulates 300 flight cycles, borescope inspect each LPC inlet guide vane (IGV) stem for proper alignment. (2) Within 50 flight cycles from the effective date of this AD, and thereafter at intervals not to exceed 50 flight cycles until the engine accumulates 300 flight cycles, borescope inspect the LPC R1 for damage and cracks at the following locations: (i) The blades tips; (ii) the leading edge; (iii) the leading edge fillet to rotor platform radius; and (iv) the airfoil convex side root fillet to rotor platform radius. (3) As the result of the inspections required by paragraphs (g)(1) and (2) of this AD, before further flight, remove and replace the LPC if: (i) An IGV is misaligned; or (ii) there is damage on an LPC R1 that exceeds serviceable limits; or (iii) there is any crack in the LPC R1. Note 1 to paragraph (g): Guidance on determining serviceable limits can be found in PW Service Bulletin (SB) PW1000G-A-72-00-0125-00A-930A-D, Issue No. 001, dated September 23, 2019, and PW SB PW1000G-A-72-00-0075-00B-930A-D, Issue No. 001, dated September 23, 2019.
Unsafe condition
This AD was prompted by two recent in-flight shutdowns on PW PW1524G-3 model turbofan engines, due to failure of the low-pressure compressor (LPC) rotor 1 (R1). The FAA is issuing this AD to prevent failure of the LPC R1. The unsafe condition, if not addressed, could result in uncontained release of the LPC R1, damage to the engine, damage to the airplane, and loss of control of the airplane.
Affected ADs
None.
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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