(1)
Location Zones
125/126 Area Aft of Forward Cargo Compartment
E.
Procedure
S 424-014
(1)
Put the fan (7) in position.
S 434-015
(2)
Install the bolt (1), washer (2), and nut (3) (2 locations) in the top fan bracket (15).
S 434-016
(3)
To install the isolator (10) on the lower fan bracket, install the bolt (11), washer (12), and nut (13) (2 locations).
S 434-017
(4)
Install the nut (9) on the rod (14).
NOTE: The nut makes an interface with the isolator.
____
S 434-018
(5)
Connect the electrical connector (8) to the fan (7).
S 434-019
(6)
Connect the bonding jumper assembly (4) to the fan (7). Install the bolt, washer, and nut.
(7)
Install the hose (6) (2 locations).
S 434-020
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(8) S 434-021Install the clamps (5) (4 locations).
(9) S 414-022Install the bulkhead lining panel (AMM 25-50-03/401).
S 864-023
(10)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P70 panel:
(a)
70B8, FWD CARGO FAN
S 864-025
(11)
Remove the DO-NOT-CLOSE tag and close this circuit breaker on the P11 panel:
(a)
11N17, CARGO HEATER FAN FWD
S 144-027
(12)
Clean the forward cargo heating intake grill.
(a)
Remove the intake grill.
(b)
Vacuum the front and back sides of the intake grill to remove all of the dirt and debris.
(c)
Install the intake grill.
S 704-028
(13)
Do a test of the fan.
(a)
Supply electrical power (AMM 24-22-00/201).
NOTE: The forward cargo temperature thermal switch automatically
____ starts and stops the forward cargo heating flow fan.
(b)
If the ambient temperature in the cargo compartment is less than 50°F (10°C): 1) Listen for fan noise to make sure the flow fan operates.
(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.
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2) Listen for fan noise to make sure the flow fan operates. S 414-029
(14)
Close the No. 1 Cargo Door (821) (AMM 06-46-00/201). S 864-030
(15)
Remove electrical power, if it is not necessary (AMM 24-22-00/201).
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FORWARD CARGO TEMPERATURE CONTROL SWITCH - REMOVAL/INSTALLATION
_______________________________________________________________
1. General_______
A. This procedure contains two tasks. The first task is the removal of the forward cargo temperature control switch. The second task is the installation of the forward cargo temperature control switch.
B. The temperature control switch for the forward cargo compartment is in the mix manifold bay. The switch is on the bulkhead immediately forward of the heat exchanger. When the cargo compartment temperature is less than 50°F (10°C), the switch closes and sends a signal to the heating flow fan. When the cargo compartment temperature becomes 70°F (21°C), the switch stops the power to the fan.
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