Covers GE90-110B1 And GE90-115B Engines With Certain Serial Numbers

The FAA has issued an emergency AD for General Electric Company (GE) Model GE90-110B1 and GE90-115B model turbofan engines with certain engine serial numbers.

The  emergency AD was prompted by investigative findings from an event that occurred on October 20, 2019, in which a Boeing Model 777-300ER airplane powered by GE GE90-115B model turbofan engines experienced an uncontained high-pressure turbine (HPT) failure that resulted in an aborted takeoff. Debris impacted the aircraft fuselage and the other engine. Uncontained HPT failure, if not addressed, could result in release of high-energy debris, damage to the engine, damage to the airplane, and possible loss of the airplane.

The FAA issued the AD because the Agency evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. Due to the need to correct an urgent safety of flight situation, good cause exists to make this AD effective in less than 30 days.

This AD requires the removal from service of the GE GE90-110B1 or GE90-115B model turbofan engine interstage seal, part number 2505M72P01 or 2448M33P01, from the affected engines.

The AD further requires that within 5 flight cycles after the effective date of this AD, operators 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.

(Source: FAA. Image from file)

FMI: rgl.faa.gov/Regulatory_and_Guidance_Library/rgad.nsf/0/F53ACC5963CD16F9862584F3001298B1?OpenDocument