(2)  
Thermometer - range 0 to 120°F (0 to 49°C) -commercially available.

 (3)  
Heating Source - hand-held blow dryer -commercially available.

 (4)  
Cooling source - ice pack - commercially
 available.

 B.
References

 (1)  
AMM 06-46-00/201, Entry, Service and Cargo Doors, Access Doors and Panels

 (2)  
AMM 24-22-00/201, Electric Power-Control

 C.
Access

 (1)  
Location Zone
 822 Left Cargo Compartment Door

 D.
Procedure

 (1)  
Supply electrical power.

 (2)  
Open the No. 2 Cargo Door.

 S 805-073

 (3)  
Find the Temperature Control Switch behind the aft cargo heating intake grill on the forward partition.

 S 865-071
 S 015-072
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 (4)  S 885-074Use the ice pack to decrease the temperature of the switch to 50°F (10°C) minimum.
 (5)  S 805-075Listen to make sure the aft cargo flow fan operates.
 (6)  S 885-076Use the heat source to increase the temperature of the switch to 70°F (21°C) maximum.
 (7)  S 805-077Listen to make sure the flow fan stops after approximately 20 seconds.
 (8)  S 885-078Remove the heat source.
 (9)  S 415-079Close the No. 2 Cargo Door
 S 865-080

 (10) Remove electrical power, if it is not necessary.

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 AFT CARGO HEATER - MAINTENANCE PRACTICES
________________________________________
 1.  General_______
 A.  This procedure contains four tasks. The first task is the removal of the aft cargo heater. The second task is the installation of the aft cargo heater. The third task is an inspection of the aft cargo heater. The fourth task is to clean the aft cargo heater.
 B.  The aft cargo heater is in the aft cargo compartment immediately aft of the forward partition. The aft cargo heater increases the temperature of the airflow in the aft cargo compartment.
 TASK 21-44-05-002-001
 2.  Remove the Aft Cargo Heater___________________________
 A.  References
 (1)  
AMM 06-46-00/201, Entry, Service, and Cargo Doors, Access Doors and Panels

 B.  
Access

 (1)  
Location Zones
 153/154 Aft Cargo Compartment

 C.  
Procedure (Fig. 201)

 S 862-002
 (1)  
Open these circuit breakers on the overhead circuit breaker panel, P11, and attach a DO-NOT-CLOSE tag:

 (a)  
11N18, CARGO HEAT AFT

 (b)  
11N22, CARGO HEAT FAN AFT

 S 862-003
 (2)  
Open this circuit breaker on the miscellaneous electrical equipment panel, P70, and attach a DO-NOT-CLOSE tag:

 (a)  
70C8, AFT CARGO HTR

 (3)  
Open the No. 2 Cargo Door (822) (AMM 06-46-00/201).

 S 012-005

 (4)  
Remove the left bulkhead lining to get access to the cargo heater (AMM 25-50-03/401).

 S 012-004
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AFT CARGO DOOR,AFT CARGO 822
HEATER SEE A
1. CLAMP 
　
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