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CHANNEL
SECONDARY
(RIGHT)
CHANNEL
CABIN
OXYGEN
14,500 FT.
CABIN ALTITUDE
VOICE MESSAGE
AND
CABIN ALT (CWP)
10,000 FT.
OR
14,500 FT.
JET PUMP
(VACUUM SOURCE)
HP BLEED
AIR
BLEED AIR
EXHAUST
CHECK
VALVE
CABIN AIR
(FILTERED)
TORQUE
MOTOR
SECONDARY
OUTFLOW
VALVE
TORQUE
MOTOR
STATIC
PORTS
PNEUMATIC
SLAVE
LINE
PRIMARY
OUTFLOW
VALVE
CABIN
ALTITUDE
LIMITER
CABIN
ALTITUDE
LIMITER
1. CABIN ALTITUDE
(AMBER & RED)
2. LR CABIN PRESS FAIL
3. CAB PRESS MAN
4. CAB DELTA P
5. L EMER PRESS ON
6. R EMER PRESS ON
7. L CABIN PRESS FAIL
8. R CABIN PRESS FAIL
9. CAB PRESS MAN
13. EMER DEPRESS
EMER PRESSURE
9,500 FT.
OR
14,500 FT.
350
1.2
1300
DELTA P
LIMITERS
(9.7 PSID)
10. LR ECS FAIL
11. L ECS FAULT
12. R ECS FAULT
F40-060000-011-01
Pilot’s Manual
PM-132A 6-33
PRESSURIZATION WARNING SYSTEM
The pressurization system provides the capability to operate at highaltitude
fields (8000 - 13,700 ft elevation) without triggering annunciations
and emergency pressurization. The logic employed for this feature
is as follows:
Applicable operating rules, pertaining to the use of oxygen at high
cabin altitude, must be observed.
The following CAS illuminations are specific to the pressurization
warning system:
Conditions Pressurization system will:
TAKEOFF
Takeoff from field
elevation less than
8000 ft
- Annunciate (CABIN ALTITUDE amber CAS) loss of cabin pressure if
cabin altitude exceeds 8750 ft.
- Activate emergency pressurization if cabin altitude exceeds 9500 ft.
- Activate “CABIN ALTITUDE” voice, CABIN ALTITUDE red CAS and
CABIN ALT red CWP if cabin altitude exceeds 10,000 ft.
Takeoff from field
elevation greater
than 8000 ft
- Annunciate (CABIN ALTITUDE amber CAS) loss of cabin pressure if
cabin altitude exceeds 14,500 ft.
- Activate emergency pressurization if cabin altitude exceeds 14,500 ft.
- Activate “CABIN ALTITUDE” voice, CABIN ALTITUDE red CAS and
CABIN ALT red CWP if cabin altitude exceeds 14,500 ft.
When the aircraft climbs above 24,500 ft:
Resume settings specified in “Takeoff from field elevation less than
8000 ft”.
NOTE: It is possible for the aircraft to climb above 24,500 feet before
an 8000-foot cabin altitude is obtained. If this happens, annunciations
and emergency pressurization may occur because of the lower settings
triggered at 24,500 feet.
LANDING
Landing at field
elevation less than
8000 ft (as selected
on LDG ALT)
- Annunciate (CABIN ALTITUDE amber CAS) loss of cabin pressure if
cabin altitude exceeds 8750 ft.
- Activate emergency pressurization if cabin altitude exceeds 9500 ft.
- Activate “CABIN ALTITUDE” voice, CABIN ALTITUDE red CAS and
CABIN ALT red CWP if cabin altitude exceeds 10,000 ft.
Landing at field
elevation greater
than 8000 ft (as
selected on LDG
ALT)
Maintain the settings specified in “Landing at field elevation less than
8000 ft (as selected on LDG ALT)” until the aircraft descends below
24,500 ft.
When the aircraft descends below 24,500 ft:
- Annunciate (CABIN ALTITUDE amber CAS) loss of cabin pressure if
cabin altitude exceeds 14,500 ft.
- Activate emergency pressurization if cabin altitude exceeds 14,500 ft.
- Activate “CABIN ALTITUDE” voice, CABIN ALTITUDE red CAS and
CABIN ALT red CWP if cabin altitude exceeds 14,500 ft.
CAS Color Description
CABIN ALTITUDE Red The cabin altitude exceeds 10,000 feet (pressurization
system LDG ALT set below 8000)
or 14,500 feet (pressurization system LDG
ALT set above 8000).
CABIN ALTITUDE Amber The cabin altitude is higher than normal for
the given conditions.

　
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