23-06-2021, 08:39 PM
With the tappet tool shown it would rely on experience and not a set torque to ensure it was correctly tightened. It is interesting to note it was already a known problem with the engine and was still in the process of being addresses by RR, it was eventually decided that every tappet has to be checked by a Snr NCO(was there ever an engineering fix?). I believe the fire was made worse on the Halifax by the a awkward placing of the fuel shut off valves and a delay in shutting them off
