Originally Posted by wilyflier
Bsieker
Thats just how compressor stalls can behave.
...Also,ice by itself can upset the airflow,without necessarily shedding or causing mechanical damage
I do remember a reference to passenger quotations of grinding noises on the approach , but that may of course have been the "landing"
It may be that compressor stalls can manifest themselves in a way that the engine first accelerates and then rolls back. And also that it may happen on both engines at nearly the same time.
But that is not the point.
The AAIB specifically talks about
:
(a) fuel flow reducing, and
(b) metering valve opening to fully open, in response to the low fuel flow.
(Remember that fuel flow is measured between the fuel metering unit and the HP filter, and is also recorded.)
If a compressor stall (caused by core icing/fan icing/cowl icing/whatever) can cause low fuel flow despite high flow being scheduled by opening the metering valve, I'd love to be enlightened about a possible mechanism.
Bernd