Great Post!
Wouldn't there be independent circuits per engine. ie. system separation?
The RegionalJet departed Little Rock at 21:21 and started climbing to FL410. At approximately 21:52, the flight crew acknowledged to Kansas City Air Route Traffic Control Center (ARTCC) that they were at FL410.
Then the stick shaker and stick pusher activated several times before the airplane entered an aerodynamic stall. Almost simultaneously, both engines shut down. The air-driven generator was automatically deployed and supplied the backup alternating current power to the airplane. At about 21:54, the flight crew asked for a lower altitude. and declared an emergency. At about 21:59 the flight crew requested an altitude of 13,000 feet. At 22:08, the flight crew stated that they had a double engine failure and that they wanted a direct route to any airport. Kansas City ARTCC directed the flight to Jefferson City Airport. At about 22:13, the flight crew stated that they had the runway approach end in sight. The airplane did not make it to the airport and crashed and broke up in a residential area. about two miles from the airport. A large fire erupted.