Air Cycle System Component Location Figure 501 (Sheet 1)
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737-300/400/500
MAINTENANCE MANUAL
OVERHEAD DISTRIBUTION MANIFOLD MAIN DISTRIBUTION MANIFOLD CABIN TO CONTROL
SEE E SEE D
250`F DUCT OVERHEAT SWITCH
FWD
MAIN DISTRIBUTION MANIFOLD
D
250`F OVERHEAT SWITCH
CLAMP ELECTRICAL CONNECTOR
FWD
CLAMP TURBOFAN OVERHEAD DISTRIBUTION MANIFOLD VALVE
E
FWD MANUAL
CONTROL
BONDING ROD
JUMPER
INBD ELECTRICAL
CONNECTOR
TURBOFAN VALVE
F
Air Cycle System Component Location
Figure 501 (Sheet 2)
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C.
D.
E.
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737-300/400/500MAINTENANCE MANUAL
References
(1)
AMM 24-22-00/201, Electrical Power
(2)
AMM 27-51-00/001, Trailing Edge Flap SystemAccess
(1)
Location Zones 101 Control Cabin - Left 102 Control Cabin - Right 212 Left Air Conditioning Equipment Bay 214 Right Air Conditioning Equipment Bay
(2)
Access Panels 3303L A/C Access Panel 3403R A/C Access Panel
Prepare for the Test
S 865-333
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LEADING
_______ EDGE SLATS. THE LEADING EDGE SLATS CAN MOVE QUICKLY WHEN THE HYDRAULIC SYSTEMS ARE PRESSURIZED, THE TRAILING EDGE FLAPS ARE AT POSITION 1,2 OR 5, AND WHEN THE AIR/GROUND RELAYS FOR THE NOSE/MAIN LANDING GEAR DETECT AN AIR MODE CONDITION. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(1)
Supply electrical power (AMM 24-22-00/201).
S 015-269
(2)
Open the bay doors to the air conditioning equipment.
S 865-270
(3)
Make sure that all the circuit breakers for the air conditioning system are closed.
S 865-271
(4)
Make sure that these circuit breakers are closed on the P6-3 panel:
(a)
MASTER CAUTION (all except FUEL, if installed)
(b)
INDICATOR LIGHTS, MASTER DIM BUS (9 locations)
(c)
DIM & TEST (1 location)
(d)
NOSE GEAR AIR/GND
(e)
LANDING GEAR AIR/GND RELAY & LTS
S 865-272
(5)
Make sure that the L PACK and R PACK switches are at OFF, on the P5-10 panel.
S 865-273
(6)
Lower the wing flaps to the FLAPS 1 position or more (AMM 27-51-00/001).
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737-300/400/500MAINTENANCE MANUAL
S 865-274
(7)
Move the APU BLEED switch to OFF, on the P5-10 panel.
S 865-275
(8)
Move the engine BLEED 1 and engine BLEED 2 switches to ON, on the P5-10 panel.
F. Procedure
S 215-173
(1)
Make sure that the L PACK and R PACK switches are at OFF.
S 715-052
(2)
Do this test of the 390°F ACM Compressor Discharge switches, S2 and S5:
(a) Disconnect the electrical connectors, D532 and D538, from the left and right switches, S2 and S5, respectively.
CAUTION: USE TWO WRENCHES TO REMOVE THE SWITCH FROM THE BOSS ON THE
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