Boeing 777X Check Program Halted After GE9X Engine Points

Boeing has quickly paused 777-9 check flights resulting from an unspecified situation with the Common Electrical 9X engine. Each Boeing and GE Aerospace have launched a joint investigation into the issue.

Boeing has manufactured 4 777X check plane, nevertheless, since August solely the 777-9, with registration N779XW, remained in flight testing. In November of 2021, the N779XZ prototype took off for the final time, on a flight between Seattle and Everett. Later in July, the N779XY prototype was additionally grounded whereas the N779XX prototype landed in Seattle the next month and has been grounded since then.

Just lately, in an interview with aviation journalist Andreas Spaeth, as shared by Aerotime, Emirates’ president Sir Tim Clark defined that an engine glitch had been an issue.

“We all know there was an engine glitch in October. They stopped the check program – not that there was a lot happening anyway. They dropped the engine, took it to Common Electrical in Cincinnati, and on December 6, 2022, we are going to get a heads up on what the issue is. Till then we anticipate the outcomes of the breakdown of the engine.”

Sir Tim Clark mentioned to Andreas Spaeth

First 777X Supply

Clark additional acknowledged that if the engine downside was severe, it could additional push again the FAA approval for the plane. Emirates at the moment goals to take supply of its first 777X plane in mid-2025.

“The July 2025 supply date we estimate is one thing I mentioned, not Boeing. They mentioned they wish to ship by the top of 2024 or the primary quarter of 2025. I mentioned judging by their efficiency at the moment, we make that July 2025. And Boeing Industrial CEO Stan Deal agreed. However the plane is over 5 years late and, if it continues to be late, our endurance can be really examined. We have now an ageing fleet, which must be changed,” Sir Tim Clark mentioned to Spaeth.

First Boeing 777X for Emirates Nears Completion
Emirates 777X winglet

Boeing is hopeful that the check program will resume in the summertime of subsequent yr, nevertheless it is dependent upon what the engine findings are, following the newest glitch. Nevertheless, if the issue is severe and it requires a redesign, it’ll change into extra difficult.

Earlier in its manufacturing, the GE9X engines put in on the 777X prototype suffered a compressor anomaly that occurred with one other engine throughout pre-delivery exams, and the maiden flight was delayed whereas the engines had been being modified to a closing certifiable configuration.

After a delay of a number of months required to develop and check fixes to the GE9X, Boeing mentioned that the GE9X engine situation would additional delay the maiden flight till 2020. The difficulty led to a redesign of the compressor, which delayed this system by six months.

Boeing And GE Aerospace Affirmation

Each Boeing and GE Aerospace are working intently to establish and clear up the issue as quickly as potential, aiming to not miss the supply date this time. Boeing offered the next assertion concerning the engine downside:

“We’re supporting GE Aerospace as they assess a latest GE9X engine situation and can resume airplane testing as soon as their thorough course of and applicable actions are full.


“Security is our high precedence, and our provider and technical groups will take the time essential to assist the evaluation as we work transparently with our clients and regulators,” Boeing added.

GE Aerospace additionally confirmed the state of affairs and mentioned that the engine producer “is reviewing a technical situation that occurred throughout GE9X post-certification engineering testing, and we’re intently coordinating with Boeing on our findings to assist their return to flight testing.”

Sources: Andreas Spaeth, Aerotime, Air Information Information


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