I noted that somewhere in the accident report it stated that the captain was in the habit of doing his run-up procedures, pitch exercising, magneto checks etc while actually taxying. In other words, on the run. I presume that this short-cut is to save time and money?
Is this a common procedure? And is this not a bit dodgy having to drag alternate brakes as each engine is run up? Can you really pay full attention to all the engine parameters while jockeying the engine levers as well as keeping the taxy speed down and keeping a sharp eye to where you are going?
Is it possible that the faulty engine may have showed a few signs of impending problems which would have been picked up on a careful static run up at a holding bay and perhaps was missed during the haste to do a run-up on the run, so to speak?
Perhaps there is indeed a hard lesson for other light twin GA operators to keep in mind..