T-45C TS, ADV & IUT ENG-27/ENG-28
Engineering Review
(2) Function
(a) Temperature-controlled air distributed
to crew ventilation ducts and head,
body, and foot louvers
(b) Ram air and inducer shutoff valves
operate automatically by proximity
switches on landing gear
(c) Main pressure regulating and shutoff
valve remains open in event of total
power loss
2.
Cockpit pressurization: maintains cockpit pressure
at predetermined value with respect to aircraft
altitude
a.
Enables pneumatic canopy seal using fifth-
stage bleed air
b.
Safety relief valve ensures that positive cockpit
pressure differential will not exceed 4.8 psi and
that inward negative cockpit differential
pressure will not exceed 0.5 psi
3.
Canopy defog
a.
Location: left and right base of windscreen and
below canopy rails in both cockpits
b.
Function: distributes conditioned air through
canopy defogging ducts
4.
Avionics cooling system
a.
Receives conditioned air from cockpit air supply
b.
Distributes air to fwd and aft avionics bays
(9-98) Original
Page 27-97
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