PART IV - EMERGENCY HANDLING

                 occurs or fall below 80 per cent., subsequent to
                 failure at a higher r.p.m., the throttle must be closed
                 to IDLE before switching on the emergency system.
                 The throttle may then be slowly re-opened.
            (d)  If the combustion has ceased, leave the emergency
                 system switched ON and relight as detailed in
                 paragraph 75.
            (e)  If the precautions stated in (b) and (c) above are
                 not observed there is a possibility of dangerous over-
                 heating or compressor stall.
            (f)  Once the emergency system is in use, all throttle
                 movements, particularly at high altitudes, must be
                 slow and smooth, to avoid flame extinction or
                 engine overspeeding.

       75.  Relighting

       (i)  Relighting should not be attempted above 15,000 feet
            as there is little likelihood of a successful relight and
            it may jeopardise the chance of a second attempt at
            lower altitude.
       (ii) If flame extinction was caused through throttle mis-
            handling, and failure of the main fuel system is not sus-
            pected, the emergency fuel system should not be switched
            on as its use reduces the chance of success.
       (iii)Set:
            Throttle to OFF
            Engine master, generator and battery starter switches all
            ON
            All non-essential electrical loads off
            Emergency fuel switch ON (if main fuel system failure
            is suspected).
       (iv) Reduce airspeed to 185 kts. so as to maintain r.p.m.
            at less than 15 per cent. and turn the relighting switch
            (marked EMERGENCY IGNITION) ON.  Open the
            throttle to just below the idling gate and wait until a
            rising j.p.t. indicates combustion has taken place.
       (v)  If there is no combustion within 20 seconds slowly close
            the throttle and re-open it to the same position.  Repeat
            this procedure until ignition occurs or one minute has
            elapsed.  If unsuccessful, close the throttle and switch
            off the relighting switch.  Raise the nose for about 5
            seconds to drain accumulated fuel and then repeat the
            procedure.
       (vi) When relight takes place and the j.p.t. has stabilized, turn
            the relighting switch OFF and open the throttle slowly

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