PART 1-DESCRIPTIVE
and Mod. 3627 is not embodied the jack may be operated
by the handpump.
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Page 21 (c) If Mod. 3627 is embodied, pull the jettison handle and, if
Para. necessary move the EMERGENCY HYDRAULICS lever
28 (c) aft.
A.L.1
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29. Cockpit pressurising, heating and ventilation
COCKPIT PRESSURIZATION AND HEATING
(a) The pressurisation heating and ventilation system is con
trolled by a wheel (1) on the port wall which alters the
settings of two valves, one admitting hot air and one cold
air. The hot air is obtained direct from the engine
impeller. The cold air supply is from the same source,
but is first passed through a cold air unit in the port
wing. The settings of the wheel are as follows:-
OFF Both valves shut, no pressurisation.
COLD Hot air valve shut, cold air valve fully open.
MIX Both valves partially open. As the wheel is
21
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