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FAA cleares PW-4000 powered 777s to fly again
United Airlines said Tuesday that the U.S. Federal Aviation Administration (FAA) had cleared the return of the airlines’ Boeing 777s powered by Pratt & Whitney PW-4000 series engines... (www.aviationweekly.org) 更多...
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we will never get the truth
This was already submitted https://flightaware.com/squawks/link/1/24_hours/new/88914/FAA_to_let_United_use_B_777_jets_grounded_after_engine_failure
So what caused that engine to fail? What were the fixes mandated?
Some info is available at this link
http://aerossurance.com/safety-management/ndi-failures-b777-pw4077-fbo/
For other information on the web, use search terms United PW4077. Also view the FAA Ads
The failures of concern involved the type PW4077 engine, 112-inch diameter fan with hollow titanium fan blades.
AFAIK FAA action includes more frequent mandatory NDT inspection of the 35-pound fan blades.
I do not have info on whether there may be mandatory reinforcements of cowling or other engine parts
http://aerossurance.com/safety-management/ndi-failures-b777-pw4077-fbo/
For other information on the web, use search terms United PW4077. Also view the FAA Ads
The failures of concern involved the type PW4077 engine, 112-inch diameter fan with hollow titanium fan blades.
AFAIK FAA action includes more frequent mandatory NDT inspection of the 35-pound fan blades.
I do not have info on whether there may be mandatory reinforcements of cowling or other engine parts
Thank you!
