(2)
Pressurized bottle system is not recommended for extremely cold weather operation (below zero degrees F). Air exiting the bottle can be much less than the ambient temperature. Frequent use of bottle carts in subzero ambient conditions will reduce starter life. Bottled air starts can be performed down to minus 40 degrees C., but only if no other means are available.
B. References
(1) AMM 24-22-00/201, Manual Control
C. Access
(1)
Location Zones
101/102 Control Cabin
200 Lower Half of the Fuselage
(2)
Access Panel
3404 A/C Access Door, Right
D. Pressurize the Pneumatic System
S 862-003
(1)
Ground the airplane.
S 012-002
(2)
Open the right A/C access door, 3404, to get access to the pneumatic ground service connector (Fig. 201).
NOTE: The access door to the pneumatic ground service connector is
____ located at the forward outboard corner of the right air conditioning bay.
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A 737-300/400/500MAINTENANCE MANUAL
SEE A
FWD A
Pressurizing Components Location Figure 201 (Sheet 1)
GROUND AIR CONNECTOR
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
BBA FULL OPEN RAM DOORRAM DOOR FULL OPENBLEED DUAL
A A A A A A APU RECIRC FAN OVHT OFF BLEED TRIP OFF AUTO HIGH AUTOAUTO L PACK OPEN AUTO CLOSE VALVE ISOLATION R PACK TEST OFF 100 80 6040 PSI TRIP ICE ANTI WING ICE ANTI BLEED OVERHEAT WING-BODY TRIP OFF PACK TRIP OFF BLEED 2 ON OFF OVERHEAT WING-BODY TRIP OFF PACK HIGH OFF 1 ON OFF 0 RESET WING
GGAA AUTO STANDBY MANUALDESCENT OFF SCHED FAIL
Pressurizing Components Location
Figure 201 (Sheet 2)
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A
737-300/400/500MAINTENANCE MANUAL
S 862-004
(3) Move the equipment for the ground pneumatic source away from the area where you will do the work.
S 862-033
WARNING: YOU MUST ISOLATE THESE SYSTEMS BEFORE YOU PRESSURIZE THE
_______ PNEUMATIC SYSTEM:
-
THE AIR CONDITIONING SYSTEM
-
THE ENGINE START SYSTEM
-
THE COWL AND WING ANTI-ICE DUCTS
-
THE HYDRAULIC RESERVOIR
-
THE POTABLE WATER TANKS.
IF YOU DO NOT ISOLATE THESE SYSTEMS, THEY CAN OPERATE AND THE PNEUMATIC SYSTEM CAN LOSE PRESSURE. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(4) Connect the pneumatic line to the connector for the ground pneumatic source.
S 862-028
CAUTION: YOU MUST SUPPLY THE ELECTRICAL POWER BEFORE YOU SUPPLY THE
_______ PNEUMATIC POWER. IF YOU DO NOT SUPPLY THE ELECTRICAL POWER FIRST, YOU CAN CAUSE DAMAGE TO THE COMPONENTS OF THE AIR CONDITIONING SYSTEM.
(5) Supply electrical power (AMM 24-22-00/201).
S 782-032
WARNING: DO NOT SUPPLY MORE THAN 60 PSIG OF PRESSURE TO THE PNEUMATIC
_______ SYSTEM. IF YOU SUPPLY TOO MUCH PRESSURE, DAMAGE TO EQUIPMENT AND INJURY TO PERSONNEL CAN OCCUR.
(6)
Start the ground air source and do not supply more than 60 psig.
(7)
Put the ISOLATION VALVE to the OPEN position (Fig. 201).
S 862-008
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