The Federal Aviation Administration is issuing a rule requiring urgent attention by operators of Boeing’s 787 Dreamliner to avoid the possibility that all three of the computer modules that manage the jet’s flight-control surfaces could briefly stop working while in flight.
Operators must periodically shut and restart the electrical power on the planes, turning off the power to the three flight control modules. That will avoid the problem until Boeing has a permanent software fix.
In an airworthiness directive 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.”
It 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.”