S 735-021
 (4)  Do a test with the fire protection system armed:
 (a)  
Set the CARGO FIRE - AFT switch on P5 overhead panel to on.

 (b)  
Make sure the ARMED light on the CARGO FIRE - AFT switch comes on.

 (c)  
Make sure the control valve and the override valve close.

 (d)  
Set the CARGO FIRE - AFT switch to off.

 (e)  
Make sure the ARMED light on the CARGO FIRE - AFT switch goes out.

 (f)  
Make sure the override valve and the control valve are open.

 S 735-126
 (5)  Do a test of the underfloor switch:
 (a)  
Set the Cargo Flow Selector on the P461 to "AFT LOW".

 (b)  
Make sure the Cargo Temperature Control Valve V10 is closed.

 (c)  
Apply cooling source to the underfloor switch to less than 32 degrees Farenheit.

 (d)  
Make sure that the switch closes and the control valve opens.

 (e)  
Apply heating source to the underfloor switch to more than 32 degrees Farenheit.

 (f)  
Make sure the switch opens and the control valve closes.

 F. Put the airplane back to its usual condition.
 S 435-114
 (1)  
Remove the cooling source from the sensor assembly box.

 (2)  
Install the coverplate on the sensor assembly box.

 (3)  
Set the AFT CARGO HT switch on the P5 overhead panel to off.

 S 415-116
 S 865-118
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 S 865-120
 (4)
Release the pressure in the pneumatic system (AMM 36-00-00/201).

 S 865-122

 (5)  
Remove electrical power (AMM 24-22-00/201).

 S 095-124
 WARNING: REFER TO THE SPECIFIED PROCEDURE WHEN YOU REMOVE THE DOOR LOCKS
_______ FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF THERE IS PRESSURE IN THE SYSTEM. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO THE EQUIPMENT.
 (6) Remove the body and the wing gear door locks (AMM 32-00-30/201).
 TASK 21-44-00-705-039
 4.  Do a Calibration Check of the Aft Cargo Compartment Overheat Switch___________________________________________________________________
 NOTE: This is a scheduled maintenance task.
____
 A. Standard Tools and Equipment
 (1)  
Cooling source - ice pack, or an equivalent source which can cool a surface to less than 40°F (4°C).

 (2)  
Heating source - Hot water bottle or an equivalent source which can heat a surface to more than 90°F (32°C).

 B. References
 (1)  
AMM 09-11-00/201, Towing

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

 (3)  
AMM 32-00-30/201, Landing Gear Door Locks

 (4)  
AMM 32-09-02/201, Air/Ground Relay System

 (5)  
AMM 36-00-00/201, Pneumatic System

 C. Access
 (1)  Location Zone
 136 Wing Landing Gear Well, RH
 145 Bulk Cargo Compartment, LH

 D. Prepare for the Test
 S 865-103
 (1)  Supply electrical power (AMM 24-22-00/201).
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 S 865-105
 (2)  
Supply pneumatic pressure (AMM 36-00-00/201).

 S 495-107

 (3)  
Make sure the landing gear ground locks are installed
 (AMM 09-11-00/201).

 S 495-109
 WARNING: REFER TO THE SPECIFIED PROCEDURE TO INSTALL THE DOOR LOCKS
_______ CORRECTLY. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO THE EQUIPMENT.
　
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