S 172-057
(6)
Flush the air cleaner with clean water.
S 162-058
(7)
Dry the air cleaner with compressed air.
S 162-059
(8)
Dry the air cleaner in an oven for one hour at 140° F (60° C).
S 422-060
(9)
Install the air cleaner.
TASK 21-58-61-402-009
4. Install the EFIS Cooling Air Cleaner (Fig. 201).____________________________________
A. References
(1) 24-22-00/201, Electrical Power
B. Access
(1) Location Zone
205 Electronic Compartment
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737-300/400/500MAINTENANCE MANUAL
C. Procedure
S 982-010
(1)
Put the air cleaner adjacent to the housing.
S 432-011
(2)
Install the clamp and the flex hose on the air cleaner purge tube.
S 432-029
(3)
Tighten the clamp to 18 to 22 pound-inches.
S 432-012
(4)
Put the air cleaner in the housing and close the latches.
S 432-013
(5)
Tighten the clamp to 18 to 22 pound-inches.
NOTE: The clamp is aft of the 90 degree exhaust plenum angle and
____
the exhaust plenum clamp.
D. Do a Test of the Fan
S 862-014
(1)
Supply electrical power (Ref 24-22-00/201).
S 862-015
(2)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P18 panel:
(a) NORM and ALT SUPPLY FAN CONT
S 862-032
(3) Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P6 panel:
(a)
EFIS SYM GEN - L and R
(b)
EFIS CONT PANEL - L and R
(c)
EHSI - L and R
(d)
EADI - L and R
S 712-030
(4) Put the EQUIP COOLING SUPPLY switch to NORMAL or ALTERNATE on the P5 overhead panel for the applicable fan.
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A 737-300/400/500MAINTENANCE MANUAL
(5) S 712-062Make sure that the applicable fan operates and that there is no air leakage from the flex hose connections.
(6) S 862-016Remove the electrical power if it is not necessary (Ref 24-22-00/201).
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EFIS COOLING FANS - REMOVAL/INSTALLATION
________________________________________
1. General_______
A. This procedure has two tasks. The first task is the removal of the EFIS cooling fans. The second task is the installation of the EFIS cooling fans.
B. There are two fans for the EFIS cooling system in the E/E compartment. The two fans are immediately outboard of the E1 rack and the nose wheel well. One fan is referred to as the normal fan. The second fan is referred to as the alternate fan. The removal and the installation of the two fans are the same.
TASK 21-58-81-004-001
2. EFIS Cooling Fan Removal (Fig. 401)________________________
A. References
(1) 21-58-91/201, EFIS Cooling Check Valves
B. Access
(1) Location Zone
205 Electronic Compartment
C. Procedure
S 864-002
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