Back on page 5, I pondered whether there was any history of rollback on CF6s. I could vaguely remember a safety notice when I was a user of CF6s, and I've found it in the FAA SAIBs.
This Special Airworthiness Information
Bulletin (SAIB) advises you, owners and
operators of all aircraft equipped with
General Electric Aircraft Engines (GE)
CF6-80C2 and CF6-80E1 series turbofan
engines of reports of on-going engine
flameout events during flight and two recent
incidents involving dual engine flameouts on
twin engine airplanes. These engines are
installed on Boeing B747, B767, and MD11
series airplanes and Airbus A300 and A330
series airplanes.
Background
Since the early 1990’s, there have been 32
reported flameout events on airplanes with
CF6-80C2 and CF6-80E1 series turbofan
engines. Two of these events involved total
power loss with a subsequent in-flight relight.
(Source : NE-07-01 October 12, 2006
Special Airworthiness Information Bulletins (SAIB))
Rollback occurs due to super-cooled water droplets in the vicinity of cu-nimbs. Just to throw a hypothesis in the pot, - ...Double engine failure, electrical load shedding and steady depressurisation (no more engine bleed air) = automatic ACARS message. Controlled descent on standby instruments, but an almost impossible ditching in the dark, with a break up on touchdown.