PART IV - EMERGENCY HANDLING
When the throttle is closed speed decreases very slowly;
the aircraft should therefore be placed firmly on the
runway as soon as possible, the nosewheel lowered and
the brakes applied, and if necessary the H.P. cock set
OFF. The landing run is very much increased.
99. Wheel brakes emergency operation
(a) (i) Should the hydraulic system fail, the wheel brake
accumulators provide sufficient pressure for brake
operation during landing, down to a gauge reading
of 750 lb./sq. in. approximately. To conserve
pressure when landing without main hydraulic
pressure do not operate the lever during the down-
wind checks.
(ii) Apply brake pressure in such a way that maxaretting
does not occur (little pressure at high speed but
increasing with decrease in speed) and avoid differ-
ential braking as much as possible. The brake lever
should not be released after brakes have once been
applied as this will result in a large loss of fluid.
(b) The H.P. cock should be put OFF on touch-down if the
brakes accumulator pressure is low and the runway short.
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A.L.1 (c) Check the accumulator pressure after landing. If it is
Para. 99 (c) almost exhausted, i.e. nearly down to 750 lb./sq. in., the
100 (a) aircraft must not be taxied. When pressure falls below this
Page 96 figure the brakes are completely inoperative.
100. Emergency use of oxygen
(a) Toxic fumes
If the cockpit becomes contaminated with toxic fumes,
ensure the air-dilution switch on the regulator is at 100%
OXYGEN and deflect the EMERGENCY switch to either
side to prevent inward leaks on the mask.
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(b) Blinker failure
(i) If the blinker mechanism ceases to operate check
that the main tube is correctly connected, that the
pressure on the regulator gauge is normal, and that
the main oxygen contents gauge is indicating that
oxygen is still available.
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