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R  A. Installation of the Conditioned Air Inlet Valve 
R  (1) Make sure that the parts retained from the removed component are 
R  clean and in the correct condition. 
R  (2) Clean the component interface and/or the adjacent area. 
R  (3) Remove the blanking plugs from the disconnected line ends. 
R  (4) Install the flexible sleeve (3) on the pipe (1). 
R  (5) Install the new O-ring (7) in the pipe (9) groove. 
R  (6) Install the valve (6) in the flexible sleeve (3). 
R  NOTE : The arrow which shows the airflow direction must be point up.____ 
R  (7) Make sure that the valve (6) is in the correct angular position. The 
R  electrical cable must not be too tight or too loose. 
R  (8) Install the clamp (8) and torque to the value given on the clamp. 
R  (9) Put the flexible sleeve (3) in position. 
R  (10) Install the clamps (2) and (4) and tighten them. 
R  (11) Remove the blanking caps from the electrical connectors. 
R  (12) Make sure that the electrical connectors are clean and in the correct 
R  condition. 
R  (13) Connect the electrical connector (5). 
R  **ON A/C ALL
 Subtask 21-26-54-865-052
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit
 breaker(s):
 3HQ, 5HQ, 6HQ

 

 Subtask 21-26-54-710-050
 C. Do an operational test of the ventilation system of the avionics
 equipment (Ref. TASK 21-26-00-710-001).

 NOTE : As an alternative procedure, you can do this operational test
____
 without the CFDS (Ref. TASK 21-26-00-710-001).

 5. Close-up
________ Subtask 21-26-54-410-050
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Close the access door 824 (Ref. TASK 52-41-00-410-002).

 (3) Remove the access platform(s). Subtask 21-26-54-862-051
 B. De-energize the ground service network (Ref. TASK 24-42-00-862-001). VALVES - SKIN EXCHANGER (16HQ,23HQ,24HQ) - REMOVAL/INSTALLATION

_______________________________________________________________ TASK 21-26-55-000-001 Removal of the Avionics Ventilation Skin Exchanger Inlet Bypass Valve (16HQ)
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking caps
 No specific blanking plugs
 No specific circuit breaker(s) safety clip(s)
 No specific access platform 1.6 m (5 ft. 3 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network from the External
 Power 53-12-13-000-001 Removal of the avionics compartment floor panels 21-26-55-991-002 Fig. 401
 3. Job Set-up
__________
 CAUTION : USE ONLY THE GROUND SERVICE NETWORK TO SUPPLY ELECTRICITY BECAUSE

_______ THE AVIONICS VENTILATION SYSTEM IS NOT SERVICEABLE. IF YOU ENERGIZE THE AIRCRAFT ELECTRICAL CIRCUITS WITHOUT THE VENTILATION SYSTEM YOU WILL CAUSE DAMAGE TO ELECTRICAL EQUIPMENT.
 Subtask 21-26-55-861-057
 A. Energize the ground service network
 (Ref. TASK 24-42-00-861-001).

 

 Subtask 21-26-55-865-060
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR COND/AVNCS VENT/CTL 6HQ D06
 Subtask 21-26-55-010-055
 C. Get Access
 (1)
 Put the access platform in position at the access door 824.

 (2)
 Open the access door 824.

 (3)
 Remove the access panel 128EG (Ref. TASK 53-12-13-000-001).

 4. Procedure
_________ (Ref. Fig. 401/TASK 21-26-55-991-002) R **ON A/C 001-049, 053-099, 101-149, 151-199, 201-299, 301-399, 401-499,
 Subtask 21-26-55-020-054
 A. Removal of the Skin Exchanger Inlet Bypass Valve
　
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