The statement that immediate action is required in the event of a fire indication at a critical flight juncture (like just after take off) is, in my opinion, bad advice. Firstly, it may be a false warning and, secondly, even if actually on fire a gas turbine is most likely to still be producing power. No action should be taken until at least 1000ft apart for the NHP to state the fault and the engine concerned and for the HP to positively confirm the diagnosis. The Thompson bird ingestion on rotate at Manchester should be usd repeatedly as an example.