787 power safety issue
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787 power safety issue
December 1, 2016 at 11:05 am
FAA orders Boeing 787 safety fix: Reboot power once in a while
Boeing & Aerospace | The Seattle Times
The FAA is mandating that operators of Boeing’s 787 Dreamliner periodically reset the power on the airplane to avoid a glitch that could cause all three computer modules that manage the jet’s flight control surfaces to briefly stop working while in flight.
Operators must periodically shut off and restart the electrical power on the planes, or the power to the three flight control modules. That will avoid the problem until Boeing comes up with a permanent software fix.
In an airworthiness directive scheduled to be published Friday, the FAA said it is reacting to indications that “all three flight control modules on the 787 might simultaneously reset if continuously powered on for 22 days.”
The FAA said such a simultaneous reset in flight “could result in flight control surfaces not moving in response to flight crew inputs for a short time and consequent temporary loss of controllability.”
FAA orders Boeing 787 safety fix: Reboot power once in a while
Boeing & Aerospace | The Seattle Times
The FAA is mandating that operators of Boeing’s 787 Dreamliner periodically reset the power on the airplane to avoid a glitch that could cause all three computer modules that manage the jet’s flight control surfaces to briefly stop working while in flight.
Operators must periodically shut off and restart the electrical power on the planes, or the power to the three flight control modules. That will avoid the problem until Boeing comes up with a permanent software fix.
In an airworthiness directive scheduled to be published Friday, the FAA said it is reacting to indications that “all three flight control modules on the 787 might simultaneously reset if continuously powered on for 22 days.”
The FAA said such a simultaneous reset in flight “could result in flight control surfaces not moving in response to flight crew inputs for a short time and consequent temporary loss of controllability.”
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Sounds a bit like a signed 16-bit minute counter wrapping round (22.75 days). Or something far more obscure, but it's less embarrassing to check the obvious ones first.
I trust they mandate that the module power cycling takes place on the ground.
I trust they mandate that the module power cycling takes place on the ground.
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And the old joke used to be re tape recorder explaining the wonders of automatic pilots to the passengers- "please sit back and relax- nothing can possibly go wrong go wrong go wrong go wron . . .
" I'm sorry pilot- I cannot do that now . ."
Nothing has changed- welcome to the microsquish blue screen . . .
" I'm sorry pilot- I cannot do that now . ."
Nothing has changed- welcome to the microsquish blue screen . . .
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Well, they are down from 248 days (Boeing 787 software bug can shut down planes' generators IN FLIGHT ? The Register). They appear to be getting closer to the problem.
