Subtask 21-26-00-710-064
 C. Do an operational test of the avionics ventilation system (Ref. TASK 21-26-00-710-001).
 5. Close-up
________ Subtask 21-26-00-410-068
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Close the access doors 812, 822 and 824.

 (3) Remove the access platform(s). Subtask 21-26-00-862-067
 B. De-energize the ground service network
 (Ref. TASK 24-42-00-862-001).

 1EFF : ALL 1 21-26-00Page 213 1 1 May 01/04R 1 1 1CES 1

 TASK 21-26-00-860-002
 Ground Operations in Heavy Rain

 1. Reason for the Job
__________________
 To prevent the rainwater to go into the avionics ventilation through the open skin air-inlet-valve during heavy rain.
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific adjustable access platform 1.8 m (5 ft. 11 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-33-21-618-001 Pre-conditioning through the HP Ground Connection R 21-26-00-710-001 Operational Check of System via MCDU 24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from the External Power 21-26-00-991-017 Fig. 202
 3. Job Set-up
__________
 Subtask 21-26-00-861-071

 A. Energize the ground service network
 (Ref. TASK 24-42-00-861-001)

 Subtask 21-26-00-010-084
 B. Get Access
 (1)
 Put an adjustable access platform in position at the access door 831.

 (2)
 Open the access door 831.

 Subtask 21-26-00-865-090
 C. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR COND/AVNCS VENT/CTL 6HQ D06 49VU AIR COND/AVNCS VENT/CTL 5HQ D05 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
R  122VU AIR COND/PACK TEMP/CTL SYS1/2/115VAC 122VU AIR COND/PACK TEMP/CTL SYS1/2/28VDC 122VU AIR COND/PACK TEMP/CTL SYS1/1/115VAC 122VU AIR COND/PACK TEMP/CTL SYS1/1/28VDC 122VU AIR COND/PACK TEMP CTL SYS2/2/28VDC 122VU AIR COND/PACK TEMP CTL SYS2/2/115VAC  21HH 23HH 1HH 3HH 24HH 22HH  W22W21X22X21Y21Y20 
R  **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302, 
R  122VU AIR COND/PACK TEMP CTL SYS2/1/28VDC  4HH  Y19 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399, 
R  122VU AIR COND/PACK TEMP CTL SYS2/1/115VAC  2HH  Y18
 **ON A/C ALL
 122VU AIR COND/AVNCS/VENT/MONG  3HQ  Y17 
R  **ON A/C 106-149, 303-399, 
R  122VU  4HH  Y19 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 123VU AVNCS VENT/EXTC/FAN  2HQ  AE02

 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------**ON A/C ALL
 123VU AVNCS VENT/BLOWER/FAN 1HQ AD10
 **ON A/C 301-399,
 123VU AVNCS VENT/EXTC/FAN 2HQ AC04
 **ON A/C ALL
 Subtask 21-26-00-860-064
 D. Aircraft Maintenance Configuration
 (1) Ground Air Pre-conditionning (Ref. TASK 12-33-21-618-001)
 WARNING : MAKE SURE THAT THERE ARE NO PERSONS OR EQUIPMENT NEAR THE
_______ RAM AIR OUTLETS. HOT EXHAUST GASES CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
 (2) On the AIR COND section of the panel 30VU, push the PACK1 and PACK2 pushbutton switches (the FAULT and the OFF legends go off).
 4. Procedure
_________
 Subtask 21-26-00-040-061
 A. Deactivation of the valves (Ref. Fig. 202/TASK 21-26-00-991-017) When the aircraft is on the ground during heavy rain, do this procedure:
 (1) On the VENTILATION section of the overhead control and indicating panel 22VU, push the EXTRACT pushbutton switch 14HQ (the OVRD legend comes on). This causes the conditionned air-inlet valve 21HQ and skin exchanger isolation-valve 24HQ to open. All the other valves close.
　
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