(a)
70B8, FWD CARGO FAN
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MAINTENANCE MANUAL
SEE A
GRILL
(REF)
WIRE FILTER (REF)
FORWARD CARGOHEATING INLET TEMPERATURE
DUCT (REF)
THERMAL SWITCH
FORWARD CARGO TEMPERATURE THERMAL SWITCH
A
P8 PANEL APU/CARGO FIRE CONTROL PANEL
APU BTLARMED ARMED DISCH a
FORWARDSEE B
FWD AFT
CARGO
r r C
FIRE
A SWITCH R
FLT COMPT OG
1-BTL DISCH-2 F DISCH APU
I R
r E
DISCH DISCH aa
APU/CARGO FIRE CONTROL PANEL
B
Forward Cargo Compartment Heating Test Components Figure 501
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MAINTENANCE MANUAL
S 865-007
(4)
Open these circuit breakers on the main power distribution panel, P6, and attach DO-NOT-CLOSE tags:
(a)
6H5, FIRE EXTINGUISHING CARGO BTL 1
(b)
6H6, FIRE EXTINGUISHING CARGO BTL 2
S 215-008
(5)
Make sure the FWD CARGO FIRE switch on the aft pilot's control stand, P8, is in the usual position (ARMED light off).
S 715-010
(6)
If the ambient temperature in the cargo compartment is less than 50°F (10°C):
(a)
Make sure the cargo compartment heating fan operates and pulls air into the inlet.
S 715-071
(7)
If the ambient temperature in the cargo compartment is more than 50°F (10°C):
(a)
Use the cooling source to decrease the temperature at the temperature control switch.
(b)
Make sure the forward cargo compartment heating fan starts and pulls air into the inlet.
S 865-011
(8)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P6 panel:
(a)
6H5, FIRE EXTINGUISHING CARGO BTL 1
(b)
6H6, FIRE EXTINGUISHING CARGO BTL 2
S 865-012
(9) Remove the electrical power, if it is not necessary
(AMM 24-22-00/201).
TASK 21-43-00-735-013
3. System Test - Forward Cargo Compartment Heating System
______________________________________________________
A. Equipment
(1)
Heating source - hand-held hair blow dryer -commercially available
(2)
Cooling source - ice pack - commercially
available
(3)
Thermometer, range 0 to 120°F (0 to 49°C) -commercially available
B.
References
(1)
AMM 06-46-00/201 Entry Service and Cargo Doors
(2)
AMM 24-22-00/201, Electrical Power Control
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C. Access
(1)
Location Zones
121/122 Forward Cargo Compartment
211 212 Control Cabin - Section 41
D.
Heating System Test
S 865-014
(1)
Supply electrical power (AMM 24-22-00/201).
S 865-015
(2)
Make sure these circuit breakers on the pilot's overhead circuit breaker panel, P11, are closed:
(a)
11N1, INSTRUMENT AND PANEL AISLE STAND
(b)
11N17, CARGO HEATER FAN FWD
(c)
11S15, AIR/GND SYS 1
