A few things for you all to mull over...
1. SQ SOPs forbide CC to self initate an EVAC command. Only exception is if FD crew are incapacitated.
2. FD crew were in contact with RFF chief and he reckoned they (RFF) could contain the fire without the need to EVAC.
3. There was no engine fire warning - I wouldn't expect one either due to the fire beginning internally in the powerplant itself.
Trickii - the interim report states where the failure of the sytem occurred.People have explained how the system works previously in this thread.