(1)
Remove the protective caps (1) and (2) from the pressure ports.
(2)
Connect the manometer 0 to 0.3447 bar (0 to 5 psi) to the pressure ports.
NOTE : The input pressure port is on the top of the filter assembly.
____ The output pressure port is on the side of the filter assembly.
4. Procedure
_________ Subtask 21-26-42-210-062
A. Check for Blockage of the Demister Filter
(Ref. Fig. 607/TASK 21-26-42-991-012)
(1) If the differential pressure is more than 29 mbar (0.42 psi):
(a) Replace the two filters (Ref. TASK 21-26-43-600-016) and (Ref. TASK 21-26-43-600-017).
5. Close-up
________ Subtask 21-26-42-862-059
A. De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
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Check for blokage of the Demister Filter and Filter Cartridge with Pressure
Ports
Figure 607/TASK 21-26-42-991-012
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B. Put the aircraft back to its initial configuration.
(1) Disconnect the manometer from the pressure ports.
(2) Install the protective caps (1) and (2) on the pressure ports. Subtask 21-26-42-410-060
C. 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).
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TASK 21-26-42-200-007 Check for Blockage of the Filter Cartridge with the Pressure Ports
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific manometer 0 to 0.3447 bar (0 to 5 psi) No specific access platform 1.60 m (5 ft. 3 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
21-26-43-600-016 Discard Demister Filter 21-26-43-600-017 Discard Filter Cartridge 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 52-41-00-410-002 Close the Avionics Compartment Doors after Access 21-26-42-991-012 Fig. 607
3. Job Set-up
__________ Subtask 21-26-42-010-063
A. Get Access
(1)
Put the access platform in position at the access door 824.
(2)
Open the access door 824.
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B. Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
NOTE : The energization of the aircraft electrical circuits starts the
____ full test of the ventilation system. The test continues for 2 minutes approximately. Do not connect the manometer until this test is completed.
Subtask 21-26-42-860-058
C. Aircraft Maintenance Configuration
(Ref. Fig. 607/TASK 21-26-42-991-012)
(1)
Remove the protective caps (1) and (2) from the pressure ports.
(2)
Connect the manometer 0 to 0.3447 bar (0 to 5 psi) to the pressure ports.
NOTE : The input pressure port is on the top of the filter assembly.
____ The output pressure port is on the side of the filter assembly.
4. Procedure
_________ Subtask 21-26-42-210-063
A. Check for Blockage of the Filter Cartridge
(Ref. Fig. 607/TASK 21-26-42-991-012)
(1) If the differential pressure is more than 29 mbar (0.42 psi):
(a) Replace the two filters (Ref. TASK 21-26-43-600-016) and (Ref. TASK 21-26-43-600-017).
5. Close-up
________ Subtask 21-26-42-862-060
A. De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
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