Airworthiness directives › 2020-01-55
AD 2020-01-55 Airworthiness Directives; General Electric Company Turbofan Engines
Applicability*9
This AD applies to all General Electric Company (GE) GE90-110B1 and GE90-115B model turbofan engines with engine serial number 907150, 907152, 907176, 907179, 907192, 907266, 907270, 907301, 907320, 907337, 907344, 907370, 907371, 907405, 907686, or 907687.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 5 flight cycles after the effective date of this AD, remove from service the interstage seal, part number 2505M72P01 or 2448M33P01, with serial number GWN0PDTR, GWN0PE7T, GWN0PGEL, GWN0PL3N, GWN0PEFH, GWN0R4H0, GWN0R4GW, GWN0R8G8, GWN0RAD1, GWN0RDNM, GWN0RCMT, GWN0RJ69, GWN0RHRM, GWN0RN5A, GWN0W153, or GWN0W03P.
Unsafe condition
This AD was prompted by investigative findings from an event involving an uncontained high-pressure turbine (HPT) failure, resulting in debris penetrating the fuselage and the other engine. The FAA is issuing this AD to prevent failure of the HPT. The unsafe condition, if not addressed, could result in uncontained HPT failure, release of high-energy debris, damage to the engine, damage to the airplane, and possible loss of the airplane.
Affected ADs
None.
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