R **ON A/C ALL
4. Procedure
_________
(Ref. Fig. 401/TASK 21-26-11-991-001, 402/TASK 21-26-11-991-002)
Subtask 21-26-11-020-051
A. Removal of the Blower and Extract Fan Pressure Switches
(1)
Disconnect the electrical connector (1).
(2)
Put blanking caps on the disconnected electrical connectors.
(3)
Disconnect the pipe (7).
(4)
Put blanking plugs on the disconnected line ends.
(5)
Remove the attaching screws (4) and the washers (3).
(6)
Remove the pressure switch (2).
(7)
Remove the blanking cap (8) and the union (6).
(8)
Discard the O-ring (5).
Blower Fan Pressure Switches Figure 401/TASK 21-26-11-991-001
1EFF : 1 1R 1CES ALL 1 11 1 21-26-11 Page 404 May 01/04
Extract Fan Pressure Switch Figure 402/TASK 21-26-11-991-002
1EFF : 1 1R 1CES ALL 1 11 1 21-26-11 Page 405 May 01/04
TASK 21-26-11-400-001
Installation of the Blower and Extract Fan Pressure Switches (17HQ, 19HQ, 30HQ)
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform 1.6 m (5 ft. 3 in.)
B. Expendable Parts
-------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
FOR FIN 17HQ 5 O-ring 21-26-01 04A-080 FOR FIN 30HQ 5 O-ring 21-26-01 16 -050 FOR FIN 19HQ 5 O-ring 21-26-01 07 -080
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R 21-26-00-710-001 Operational Check of System via MCDU 21-26-11-710-001 Operational Test of the Extract-Fan Pressure Switch (30HQ) (without the CFDS) 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 FOR FIN 19HQ, 30HQ 52-41-00-410-002 Close the Avionics Compartment Doors after Access
3. Job Set-up
__________
Subtask 21-26-11-860-052
A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized (Ref. TASK 24-42-00-861-001).
Subtask 21-26-11-010-051
B. Get Access
(1)
Make sure that the access platform are in position at the access doors 811 and 824.
(2)
Make sure that the access doors are open:
FOR 19HQ, 30HQ
824
FOR 17HQ
811
Subtask 21-26-11-865-051
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 17HQ, 19HQ
49VU AIR COND/AVNCS VENT/CTL 6HQ D06 49VU AIR COND/AVNCS VENT/CTL 5HQ D05 122VU AIR COND/AVNCS/VENT/MONG 3HQ Y17 123VU AVNCS VENT/BLOWER/FAN 1HQ AD10
FOR 30HQ 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, 401-499,
123VU AVNCS VENT/EXTC/FAN 2HQ AE02
**ON A/C 301-399,
123VU AVNCS VENT/EXTC/FAN 2HQ AC04
R **ON A/C ALL
4. Procedure
_________
Subtask 21-26-11-420-050
A. Installation of the Blower and Extract Fan Pressure Switches
(1)
Install on the union (6) :
FOR 17HQ
O-ring (5)
FOR 19HQ
O-ring (5)
FOR 30HQ
O-ring (5)
(2)
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