757
MAINTENANCE MANUAL
S 414-021
(3) If removed, install the left bulkhead panel at the aft end of the forward cargo compartment (AMM 25-50-03/401) and connect the heating duct intake.
S 414-012
(4) Install the left recirculation filter access panel.
S 864-013
(5) Remove the DO-NOT-CLOSE tag and close this circuit breaker on P70 panel: (a) 70B8, FWD CARGO FAN
S 864-015
(6) Remove the DO-NOT-CLOSE tag and close this circuit breaker on P11 panel: (a) 11N17, CARGO HEATER FAN FWD
S 704-030
(7) Do a test of the forward cargo temperature control switch. (a) Supply electrical power (AMM 24-22-00/201).
NOTE:____ The forward cargo temperature control switch measures cargo compartment temperature. When the cargo compartment is more than 50°F (10°C) the switch closes and sends a signal to the forward cargo heating flow fan. When the cargo compartment temperature becomes 70°F (21°C) the switch stops the power to the fan.
(b) If the ambient temperature in the cargo compartment is less than 50°F (10°C): 1) Make sure the cargo heating flow fan operates. 2) Use the heating source to increase the temperature at the temperature control. 3) Make sure the cargo heating fan stops.
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(c) If the ambient temperature in the cargo compartment is more than 50°F (10°C): 1) Use the cooling source to decrease the temperature at the temperature control switch. 2) Make sure the cargo heating flow fan operates.
(8) S 414-019Close the No. 1 Cargo Door (821) (AMM 06-46-00/201).
(9) S 864-020Remove electrical power, if it is not necessary (AMM 24-22-00/201).
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FORWARD CARGO FAN CURRENT SENSOR - REMOVAL/INSTALLATION
_______________________________________________________
1. General
_______
A. This procedure contains two tasks. The first task is the removal of the forward cargo fan current sensor. The second task is the installation of the forward cargo fan current sensor.
B. The forward cargo fan current sensor is in the miscellaneous electrical equipment panel, P70.
TASK 21-43-07-004-001
2. Remove the Forward 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
(2)
Access Panel
119BL E/E Access Door
C.
Procedure
S 864-002
WARNING: DO NOT OPEN THE ELECTRICAL EQUIPMENT PANEL DOORS WHEN THE POWER
_______
IS ON. FIRE OR INJURY CAN OCCUR.
ú WARNING:_______REFER TO AMM 27-61-00/201 AND DO THE SPOILER/SPEEDBRAKE DEACTIVATION PROCEDURE. ACCIDENTAL SPOILER MOVEMENT CAN CAUSE INJURY OR DAMAGE.
(1)
Do the spoiler/speedbrake deactivation procedure (Ref 27-61-00).
(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, (Ref 06-41-00).
(4)
Open the doors of the miscellaneous electrical equipment panel.
S 864-019
S 014-005
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