The electrical systems on Boeing 787s need to be shut down and restarted before they reach 248 days of continuous power, the FAA said on Friday, to prevent a "loss of all AC electrical power, which could result in loss of control of the airplane." The airworthiness directive was issued "straight to final rule," without a preliminary notice, and is effective immediately. The FAA said it was informed about the problem by Boeing, and the manufacturer is working on a software upgrade that will address the issue. "Once this software is developed, approved, and available, we might consider additional rulemaking," the FAA said.
This is a companion discussion topic for the original entry at https://www.avweb.com/recent-updates/business-military/faa-mandates-787-electrical-reboots