4. Procedure
_________
(Ref. Fig. 403/TASK 21-26-55-991-004) Subtask 21-26-55-420-053
A. Installation of the Skin Exchanger Outlet Bypass Valve
(1)
Install the grid (34) on the valve (37).
(2)
Install the clamp (35); do not fully tighten at this time.
(3)
Remove the blanking plugs from the disconnected line ends.
(4)
Put the new O-ring (38) in the groove of the duct (40).
(5)
Install the valve (37) on the duct (40). NOTE : The arrows that indicates the air flow points down.
____
(6)
Make sure that the valve (37) is in the correct angular position. The electrical cable must not be too tight or too loose.
(7)
Install the clamp (39) and tighten to torque value which is indicated on the clamp.
(8)
Put the flange (32) into position.
(9)
Install the bolt (31) and the nut (30) and then tighten.
(10)
Tighten the clamp (35).
(11)
Tighten the screws (33).
(12)
Remove the blanking caps from the electrical connectors.
(13)
Make sure that the electrical connectors are clean and in the correct condition.
(14) Connect the electrical connector (36). Subtask 21-26-55-865-058
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 5HQ, 6HQ.
Subtask 21-26-55-710-052
C. Do this Test
(1) 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 21-26-55-710-001).
5. Close-up
________ Subtask 21-26-55-410-053
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 812.
(3) Remove the access platform(s). Subtask 21-26-55-862-055
B. De-energize the ground service network
(Ref. TASK 24-42-00-862-001).
VALVES - SKIN EXCHANGER (16HQ,23HQ,24HQ) - ADJUSTMENT/TEST
__________________________________________________________ TASK 21-26-55-710-001 Operational Test of the Skin-Exchanger Outlet Bypass-Valve (23HQ) without the
Centralized Fault Display System (CFDS)
1. Reason for the Job
__________________
Test after the removal/installation of the skin-exchanger outlet
bypass-valve 23HQ if the CFDS is unserviceable.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power 31-60-00-860-001 EIS Start Procedure 31-60-00-860-002 EIS Stop Procedure
3. Job Set-up
__________ Subtask 21-26-55-861-056
A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
Subtask 21-26-55-865-059
B. 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 122VU AIR COND/AVNCS/VENT/MONG 3HQ Y17
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