Hawker 800 XP, Pilot Training Manual

Page: 333 / 504

The warning annunciator is located on
the master warning panel.
NOTE
With flaps selected beyond 15°, the
warning horn is electrically isolated
for this condition.
• At 13,500 ±1,500 feet (cabin altitude), the
pressure regulators cause the outflow/safety
valves to close, minimizing further loss of
cabin pressure through the valves.
In order to stabilize any of the above condi-
tions, the pilot can select manual pressuriza-
tion control or use the auxiliary heating valve
to provide emergency pressurization. The
dump valve can be used to relieve excess pres-
sure in the airplane.
CABIN Triple Indicator
A triple pointer CABIN indicator (Figure
12-4) is installed on the copilot’s instrument
panel. The A pointer displays cabin altitude,
the plain (unmarked) pointer indicates cabin
altitude rate of change, and the red and white
barber-pole pointer shows cabin differential
pressure.
MANUAL CABIN ALTITUDE
CONTROL Knob and PRESSURI-
ZATION CONTROL Lever
The MANUAL CABIN ALTITUDE CON-
T RO L k n o b a n d t h e P R E S S U R I Z AT I O N
CONTROL lever (Figure 12-5) allow the copi-
lot to manually control the pressurization sys-
tem. The manual controls are located on the
copilot’s side console.
Control of one outflow/safety valve and the
desired cabin altitude and rate of change is
accomplished with the MANUAL CABIN
ALTITUDE CONTROL knob.
12-5
FOR TRAINING PURPOSES ONLY
HAWKER 800 XP PILOT TRAINING MANUAL
FlightSafety
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Figure 12-3. HORN ISOLATE Pushbutton
Figure 12-4. CABIN Triple Indicator
Figure 12-5. Manual Pressurization Controls