The G-ARWE problem was caused when the check captain in the jump seat helpfully silenced the u/c warning horn when the No 2 thrust lever was closed during the engine failure drill. The f/e (I think) was reaching for the u/c horn cutoff switch, but as it was cancelled already he hit the fire bell cutoff which I think is close to the u/c horn cutoff on the panel. So, he never progressed to pulling the fire handle because the fire bell never rang (it was cancelled at the instant it would have started to ring) and the engine fire checklist was not read.
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Feathers