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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
C. Access
(1) Location Zone
101 Control Cabin - Left
102 Control Cabin - Right
205 Electronic Compartment
D. Procedure
S 865-001
(1)
Supply electrical power (AMM 24-22-00/201).
S 215-003
(2)
Make sure these circuit breakers are closed on the P18 panel:
(a)
EQUIP COOLING CONT
(b)
BLOWER NORMAL
(c)
BLOWER ALTERNATE
S 865-004
(3)
If a MASTER CAUTION light and the OVERHEAD light are on, push the MASTER CAUTION light to make the lights go off.
S 865-005
(4)
Put the EQUIP COOLING selector switch to NORMAL, at the P5 panel.
S 715-006
(5)
Make sure that the main blower operates.
S 215-008
(6)
Make sure that the flow control valve is open.
S 215-009
(7)
Make sure that the EQUIP COOLING OFF light, on the P5 panel, is off.
S 215-011
(8)
Make sure that the MASTER CAUTION lights and the OVERHEAD light are off.
(9)
Put the EQUIP COOLING selector switch to ALTERNATE.
(10)
Make sure that the alternate blower operates.
(11)
Make sure that the flow control valve stays open.
S 215-016
(12)
Make sure that EQUIP COOLING OFF light, MASTER CAUTION lights, and the OVERHEAD light stay off.
S 865-012
S 715-013
S 215-015
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
Equipment Cooling Rack Location
Figure 501
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 865-018
(13) Open this circuit breaker on the P18 panel and attach a DO-NOT-CLOSE tag:
(a) BLOWER ALTERNATE
S 715-019
(14)
Make sure that the alternate blower does not operate.
S 215-021
(15)
Make sure that the EQUIP COOLING OFF light, MASTER CAUTION lights, and the OVERHEAD light come on within 10 minutes.
S 865-023
(16)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P18 panel:
(a) BLOWER ALTERNATE
S 715-024
(17)
Make sure that the alternate blower starts to operate again.
S 215-026
(18)
Make sure that the EQUIP COOLING OFF light goes off within 5 minutes.
S 865-057
(19)
Push the MASTER CAUTION light to make the MASTER CAUTION light and the OVERHEAD light go out.
S 865-029
(20)
Put the EQUIP COOLING selector switch to NORMAL.
(21)
Make sure that the main blower operates.
S 215-031
(22)
Make sure that EQUIP COOLING OFF light, MASTER CAUTION lights, and the OVERHEAD light stay off.
S 865-033
(23)
Remove the electrical power if it is not necessary (AMM 24-22-00/201).
S 715-030
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