Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов

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Page 12-3
Pilot’s Operating Manual
Original Issue: Feb, 2002
Sub-section 12
OXYGEN SYSTEM
Hawker 800XP Pro Line 21
Section III - SYSTEMS DESCRIPTION
GENERAL
Two 750 liter oxygen cylinders (with provision for a third 750 liter cylinder) are mounted in the rear
equipment bay between frames 24 and 25. The cylinders are charged to 1800 psi and normally supply
oxygen to two quick-release sockets in the flight compartment, two therapeutic outlets and eight drop-
out mask units in the passenger cabin and one drop-out mask unit in the toilet compartment.
An automatic shut-off valve is located in the oxygen box assembly (Figure 3) which will shut-off the
supply of oxygen should there be a rupture of the supply pipeline downstream of the valve. Provision
is made to install a regulator and quick-release socket in the forward vestibule cabinet for a third crew
member, a drop-out mask in the vestibule, and for additional drop-out mask units in the passenger
cabin depending on the number of seats.
Cylinder pressure is reduced to a nominal 70 psi by a pressure regulator incorporating a relief valve
operating at 90 psi. The pressure regulator has an integral grounding lug attached to two bonding leads
from the adjacent system piping.
The supply for the therapeutic outlets is taken directly from the pressure regulator. The drop-out masks
supply is taken from the pressure regulator through a baromatic valve and the passenger supply valve.
The baromatic valve automatically causes the masks to fall to the
half-hang position at a certain cabin
altitude and can be operated manually to release the masks at any altitude.
750 LITER
OXYGEN
CYLINDERS
TAIL
FRAME 24
VENT HOSE
BLANKING PLUG IF
THIRD CYCLINDER
IS NOT
SEALED BOX
SCREENS
OPTIONAL 750 LITER
OXYGEN CYLINDER
BLANKING PLUG IF 3rd CYLINDER NOT INSTALLED
Figure 1
Oxygen Cylinder Assembly