S 414-011
(3)
Install the bulkhead lining panel (AMM 25-50-03/401).
S 864-012
(4)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel:
(a)
11N22, CARGO HEAT FAN AFT
S 864-013
(5)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P37 panel:
(a)
37C2, AFT CARGO FAN
(6)
Supply electrical power (AMM 24-22-00/201).
S 864-014
NOTE: The aft cargo temperature control switch measures the
____ cargo compartment temperature. When the cargo compartment temperature is less than 50°F the control switch closes and sends a signal to the aft cargo heating flow fan. When the cargo compartment temperature is 70°F the switch stops power to the fan.
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MAINTENANCE MANUAL
S 214-015
(7) If the ambient temperature in the cargo compartment is less than 50°F (10°C), do these steps: (a) Make sure the cargo heating flow fan operates. (b) Use the heating source to increase the temperature of the control switch to 70°F (21°C) maximum. (c) Make sure the cargo heating flow fan stops.
S 214-016
(8) If the ambient temperature in the cargo compartment is more than 50°F (10°C), do these steps: (a) Use the cooling source to decrease the temperature of the control switch to 50°F (10°C) minimum. (b) Make sure the cargo heating flow fan operates.
S 414-017
(9) Close the No. 2 cargo door (822) (AMM 06-46-00/201).
S 864-018
(10) Remove electrical power, if it is not necessary.
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757 MAINTENANCE MANUAL
AFT CARGO FAN CURRENT SENSOR - REMOVAL/INSTALLATION
___________________________________________________
1. General
_______
A. This procedure contains two tasks. The first task is the removal of the aft cargo fan current sensor. The second task is the installation of the aft cargo fan current sensor.
B. The aft cargo fan current sensor is in the miscellaneous electrical equipment panel, P37.
TASK 21-44-09-004-001
2. Remove the Aft Cargo Fan Current Sensor (Fig. 401)
_______________________________________
A. References
__________
(1)
06-41-00/201, Fuselage Access Doors and Panels
(2)
24-22-00/201, Electrical Power - Control
(3)
27-61-00/201, Spoiler/Speedbrake Control System
B.
Access
(1)
Location Zones
119/120 Main Equipment Center
C.
Procedure
S 864-010
WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SPOILERS OR MOVE ALL
_______ PERSONS AND EQUIPMENT AWAY FROM THE SPOILERS. THE SPOILERS CAN RETRACT QUICKLY AND CAUSE INJURY OR DAMAGE.
(1) Do the deactivation procedure for the spoilers (Ref 27-61-00) or move all persons and equipment away from the spoilers.
S 864-002
WARNING: DO NOT OPEN THE ELECTRICAL EQUIPMENT PANEL DOORS WHEN THE POWER
_______
IS ON. FIRE OR INJURY CAN OCCUR.
(2)
Remove electrical power from the airplane (Ref 24-22-00).
S 014-003
(3)
Open the E/E access door (119BL) and find the miscellaneous electrical equipment panel, P37 (Ref 06-41-00)
(4)
Open the doors of the miscellaneous electrical equipment panel, P37.
S 034-005
(5)
Remove the fan power wire from the current sensor with one of these steps:
(a)
Remove the wire from terminal A1 of the AFT CARGO FAN RELAY and put a tag on the wire to identify it for installation. Remove the wrap on the wire bundle as necessary. Pull the wire through the hole in the current sensor.
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