Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов

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Page 10-16
Pilot’s Operating Manual
Revision A1: Nov, 2002
Sub-section 10
ENVIRONMENTAL
Hawker 800XP Pro Line 21
Section III - SYSTEMS DESCRIPTION
CABIN DEPRESSURIZATION WARNING
A normal datum pressure switch operates and illuminates the CABIN ALTITUDE red annunciator on the
MWS panel. A warning horn sounds when the cabin altitude reaches 9300
±
300 ft. The horn may be
silenced by pushing a HORN ISOLATE button on the left thrust lever knob. A CABIN ALT button, on the
TEST section of the overhead roof panel, is provided for checking the warning system.
NOTE: With flaps lowered beyond 15
°
, the depressurization warning horn is electrically isolated.
A second pressure switch is installed to permit take-off and landing at airfields above 9000 ft elevation.
The high altitude datum pressure switch is controlled by an illuminated push button switch labelled
CABIN HIGH DATUM on the copilot’s instrument panel.
When the button is pushed and illuminated, the high altitude datum pressure switch controls the set-
point of the depressurization warning at 14,000
±
300 ft.
When the push button is not operated and not illuminated, the normal datum pressure switch 9300
±
300 ft controls the set-point.
DUMP VALVE
A butterfly type dump valve on the right sidewall of the nose gear bay can be set between OPEN and
SHUT, by movement of a DUMP VALVE operating lever. The operating lever is located to the right of
FMS No. 2 display screen.
The dump valve is used in conjunction with the ram air supply, (DUMP VALVE lever fully OPEN), to
provide ventilation when the cabin is unpressurized in flight.
High Datum
Pressure Switch
CABIN ALTITUDE
(Roof Panel Test Area)
Normal Datum
Pressure Switch
14,000 ft
±
300 ft
9300 ft
±
300 ft
HORN
HORN
ISOLATE
FLAPS 15
°
CABIN
ALTITUDE
CABIN
HIGH
DATUM