(3)
C21001-12 Equipment Cooling System Performance Test Set
(alternative)
(4)
F80237-13 Equipment Cooling System Performance Test Set
(alternative)
(5)
Aluminum Foil Marker - BAC27DEX2015
C. References
(1)
AMM 21-58-03/101, Equipment Cooling System
(2)
AMM 24-22-00/201, Electrical Power
(3)
AMM 34-62-11/401, FMCS Control Display Unit
D. Access
(1) Location Zones
101 Control Cabin - Left
102 Control Cabin - Right
205 Electronic Compartment
E. Prepare for the Test
S 035-025
(1)
Release the fasteners at the modules on the main instrument panel.
S 015-026
(2)
Move the modules aft to the stops to get access to the test ports 11 through 16 (Fig. 502).
S 015-027
(3)
Remove the Control Display Units (CDUs) of the Flight Management Computer System (FMCS), on the P9 panel, to get access to the test ports 17 and 18 (Fig. 502) (AMM 34-62-11/401).
S 015-050
(4)
Open the P6-2 circuit breaker panel to get access to the test port 10.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH EFIS ú
21-58-03
ú ú 04 Page 512 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 015-028
(5)
Remove the aluminum foil markers from the remaining test ports which are on the E/E racks in the electronic compartment (Fig. 502).
S 865-031
(6)
Supply electrical power (AMM 24-22-00/201).
S 215-032
(7)
Make sure these circuit breakers are closed on the P18 panel:
(a)
NORMAL EXHAUST FAN POWER
(b)
ALTERNATE EXHAUST FAN POWER
(c)
EXH FAN CONTROL
S 865-033
(8)
Make sure that the EQUIP COOLING EXHAUST selector switch is at NORMAL, on the P5 panel.
S 865-034
(9)
Close the hatch in the electronic compartment if the ambient temperature outside of the airplane is below 40°F.
F. Do the System Performance Test
S 285-035
(1)
Measure the temperature in the electronics compartment between the E-2 and E-3 equipment racks.
S 975-036
(2)
Make a record of the temperature.
S 975-037
(3)
Make a record of the barometric pressure.
(4)
Measure the pressure at each test port (Fig. 502 and 503).
S 785-038
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ú ú 04 Page 513 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 975-039
(5)
Make a record of the test port pressures (Fig. 505).
S 975-040
(6)
Correct the test port pressures for the ambient temperature and barometric pressure as shown in Fig. 504.
S 975-041
(7)
Make a second record of the test port pressures (Fig. 505).
S 975-042
(8)
Make sure the test port pressures are the same value as or more than the minimum acceptable pressures shown in the Fig. 505.
NOTE: Refer to AMM 21-58-03/101 for fault isolation data if one or
____ more of the test port pressures are less than the minimum acceptable pressures.
G. Put the Airplane Back to Its Usual Condition
S 415-044
(1)
Install a new aluminum foil decal on the top of the test ports which are on the equipment racks in the electronic compartment (Fig. 502).
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