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FAA orders new 787 electrical fix to prevent power failure
All Boeing 787 operators will be required to periodically deactivate the electrical system to avoid a problem with a newly-discovered software bug that could cause the aircraft to lose alternating current (AC) power, the US Federal Aviation Administration says in a new airworthiness directive. The agency adopted the final rule after Boeing reported the results of a laboratory test showing a total loss of power is possible if the generator control units run continuously for eight months, says the… (www.flightglobal.com) Más...Sort type: [Top] [Newest]
Can we say "REBOOT".
So it's possible that the electrical system was on continuously even during the various maintenance checks? Come on ...
Good point. I don't totally buy that, either. That being said, I have worked on systems that have ridiculously onerous "Keep Alive" power schemes -PITA to bypass.
Is it even normal operating procedure to have the APU on while towing the plane into the hangar for the check?
[Is] the APU on while towing the plane?
That would sound like normal ops to me. I wouldn't want to depend on battery power to run the auxiliary hydraulic pumps to stop the rather large aircraft when the tow bar breaks! I'm sure there is a brake hydraulic accumulator, but why take chances! Maybe a reply from some 787 mechanics would be nice...
That would sound like normal ops to me. I wouldn't want to depend on battery power to run the auxiliary hydraulic pumps to stop the rather large aircraft when the tow bar breaks! I'm sure there is a brake hydraulic accumulator, but why take chances! Maybe a reply from some 787 mechanics would be nice...
APU doesn't need to be running; the LiON pack has substantial capacity. You'd have to ask someone familiar with that model's power distribution / power management scheme. I've seen a basic flowchart and remember thinking "good luck!".. ..
You're right. I'm sure Boeing made it all up...
"Have you tried turning it off and on again"!!!