W DOC AIRBUS | AMM A320F

Operational Check of Fan High Speed Mode

TASK 21-26-00-710-013-A
Operational Check of Fan High Speed Mode

ZONE: 128
ZONE: 210
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
AR
CAP - BLANKING
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
97D21503000000
1
TEST TOOL-TWO SPEED FANS
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
128
REAR AVIONIC COMPARTMENT
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
824
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 24-41-00-861-002-A
Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01
Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02
Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A
De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01
De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 52-41-00-410-002-A
Close the Avionics Compartment Doors after Access
F Testing Tool Installation
3. Job Set-up
Subtask 21-26-00-861-072-A ** ON A/C NOT FOR ALL
A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
NOTE: The energization of the aircraft electrical circuits starts a full test of the ventilation system. The test continues for 2 minutes approximately.
Subtask 21-26-00-865-091-A ** ON A/C NOT FOR ALL
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/AVNCS VENT/CTL6HQD06
49VUAIR COND/AVNCS VENT/CTL5HQD05
122VUAIR COND/AVNCS/VENT/MONG3HQY17
123VUAVNCS VENT/BLOWER/FAN1HQAD10
123VUAVNCS VENT/EXTC/FAN2HQAE02
Subtask 21-26-00-010-085-A ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 824.
   (2) Open the access door 824.
4. Procedure
Subtask 21-26-00-480-051-A ** ON A/C NOT FOR ALL
A. Installation of the Testing Tool
   (1) Disconnect the electrical connector (1) from the sensor (2).
   (2) Connect the connector (3) of the 97D21503000000 TEST TOOL-TWO SPEED FANS (4) to the sensor (2).
   (3) Connect the electrical connector (1) to the connector (6) of the 97D21503000000 TEST TOOL-TWO SPEED FANS (4).
Subtask 21-26-00-720-052-A ** ON A/C NOT FOR ALL
CAUTION: IF THE TEMPERATURE OF THE BLOWN AIR (SENSED BY SENSOR 32HQ) IS HIGHER OR EQUAL TO 35°C, DO NOT DO THIS TEST FOR MORE THAN 5 MIN. IF THE TEST CONTINUES FOR MORE THAN 5 MIN, THERE IS A RISK OF DAMAGE TO THE EQUIPMENT IN THE AVIONICS COMPARTMENT (NOT SUFFICIENT VENTILATION).
B. Functional Test of the Low Speed
ACTION
RESULT
1.On the 97D21503000000 TEST TOOL-TWO SPEED FANS (4), make sure that the switch (5) is in the AUTO position.
2.Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
1HQ, 2HQ, 3HQ, 5HQ, 6HQ.
NOTE: The energization of the aircraft electrical circuits starts a full test of the ventilation system. The test continues for 2 minutes approximately.
3.On the 97D21503000000 TEST TOOL-TWO SPEED FANS (4), set the switch (5) to the LOW SPEED position.
  • After 15 seconds approximately, the blower fan 20HQ and the extract fan 18HQ operate at low speed
  • No warning related to the system is shown on the upper ECAM display unit.
4.Set the switch (5) to the AUTO position.
Subtask 21-26-00-720-053-A ** ON A/C NOT FOR ALL
C. Functional Test of the High Speed
ACTION
RESULT
1.On the 97D21503000000 TEST TOOL-TWO SPEED FANS (4), set the switch (5) to the HIGH SPEED position.
  • After 15 seconds approximately, the blower fan 20HQ and the extract fan 18HQ operate at high speed.
  • No warning related to the system is shown on the upper ECAM display unit.
2.Set the switch (5) to the AUTO position.
3.Open, safety and tag this(these) circuit breaker(s):
1HQ, 2HQ, 3HQ, 5HQ, 6HQ.
4.Disconnect the electrical connector (1) from the connector (6) of the 97D21503000000 TEST TOOL-TWO SPEED FANS (4).
5.Disconnect the connector (3) of the 97D21503000000 TEST TOOL-TWO SPEED FANS (4) from the sensor (2).
6.Connect the electrical connector (1) to the sensor (2).
7.Put CAP - BLANKING on the disconnected connectors.
5. Close-up
Subtask 21-26-00-865-092-A ** ON A/C NOT FOR ALL
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/AVNCS VENT/CTL6HQD06
49VUAIR COND/AVNCS VENT/CTL5HQD05
122VUAIR COND/AVNCS/VENT/MONG3HQY17
123VUAVNCS VENT/BLOWER/FAN1HQAD10
123VUAVNCS VENT/EXTC/FAN2HQAE02
Subtask 21-26-00-860-070-A ** ON A/C NOT FOR ALL
B. Condition of the Automatic Start of the Ventilation System Test.
NOTE: The energization of the aircraft electrical circuits starts a full test of the ventilation system. The test continues for 2 minutes approximately.
NOTE: If the temperature sensed by the sensor 32HQ is more than 40 degrees celsius ( 194 degrees fahrenheit ), the two fans operate at high speed.
If the temperature sensed by the sensor 32HQ is less than 35 degrees celsius ( 95 degrees fahrenheit), the two fans operate at low speed.
Subtask 21-26-00-410-082-A ** ON A/C NOT FOR ALL
C. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
   (3) Remove the access platform(s).
Subtask 21-26-00-862-072-A ** ON A/C NOT FOR ALL
D. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.9 from 2019] 2026.04.02 06:11:01 UTC
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