ttcse:
Your double-flameout is less convoluted only because you ommited the 'and then.....'.
I'll try it:
When the pitots-probe/TAT were assumed frozen by the pilots, they would have read in the QRH that any "stall warning" should be respected. As they experienced undue stall warnings from the begining of the sequence, without noticing any buffeting nor decreasing aerodynamic noise; they decided to ignore it. But, in order to keep a safer margin, they decided to reduce their altitude, just in case. Thrust was set to idle for a safe descent,
and then, an engine flameout occured because some very small ice particules in this saturated Anvil had accumulated over the engine for a too long time.
S~
Olivier