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I agree with George and Charlie that Andre's
experience was not detonation, which would not manifest as a single big
bang. Compressor stall would produce the perceived noise without a
combustion event in the exhaust system but the engine's "E" designation
and the rough running before the event point to ignition or fuel. No
big leap of insight here as an engine needs three "consumables" to
produce power, air, fuel & spark, so if it aint air it's gotta be
one of the other two.
One thing I would add to check, based on the comment "one loud bang
lasting 1 second", is the fuel system. A
second is a long time for an ignition problem. I would think it is not
a problem with a clogged filter or screen because this would not cause
a transient event and the flow rates are much higher during takeoff. A
balky pressure regulator, relief valve or fuel pump could be the
problem but, given the Wx lately, my guess (emphasis on guess) is
either fuel contamination, specifically water or low vapor pressure
pressure (winter gas) combined with the warm (-10C) OAT to cause fuel
pump cavitation.
A thorough check of air, fuel and ignition systems IS in order.
Regards
Brent Regan
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