W DOC AIRBUS | TSM A320F

Fan Air Valve of the Engine 2 Not in Fully Open Position

TASK 36-11-00-810-806-A-01
Fan Air Valve of the Engine 2 Not in Fully Open Position

1. Possible Causes
  • THERMOSTAT-FAN AIR VALVE CTL [7170HM]
  • O-RING
  • VALVE-FAN AIR, ENG2 [9HA2]
  • sense line between the fan-air valve control-thermostat (7170HM) and the fan air valve (9HA2)
  • SENSOR-EXCHANGER OUT TEMP, ENG 2 [6HA2]
  • wiring
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
CAP - BLANKING
No specific
Torque wrench: range to between 1.76 and 1.44 m.daN (12.98 and 10.62 lbf.ft ) T
98D36003000000
1

 B. Referenced Information
REFERENCE
DESIGNATION
AMM 36-11-00-710-003
Operational Test of the Bleed Air System
ASM 361102
AIPC 36110606
AMM 36-11-17-000-001
Removal of the Heat-Exchanger Outlet-Temperature Sensor
AMM 36-11-17-400-001
Installation of the Heat-Exchanger Outlet-Temperature Sensor
AMM 36-11-43-000-001
Removal of the Fan-Air Valve Control-Thermostat
AMM 36-11-43-000-003
Removal of the Filter of the Fan-Air Valve Control-Thermostat
AMM 36-11-43-400-001
Installation of the Fan-Air Valve Control-Thermostat
AMM 36-11-43-400-003
Installation of the Filter of the Fan-Air Valve Control-Thermostat
AMM 36-11-49-000-029
Removal of the Pneumatic Sense Lines in the Pylon
AMM 36-11-49-000-820
Removal of the Pneumatic Sense Lines in the Pylon
AMM 36-11-49-400-029
Installation of the Pneumatic Sense Lines in the Pylon
AMM 36-11-49-400-820
Installation of the Pneumatic Sense Lines in the Pylon
AMM 36-11-54-000-001
Removal of the Fan Air Valve
AMM 36-11-54-400-001
Installation of the Fan Air Valve
AMM 36-11-54-720-001
Functional Test of the Opening of the Fan Air Valve 9HA1 with the Bleed Test Set P/N 98D36003000000
3. Fault Confirmation
Subtask 36-11-00-710-420-A ** ON A/C NOT FOR ALL
A. Test
   (1) Not Applicable
4. Fault Isolation
CAUTION: BE CAREFUL WITH THE SEMI-FLEXIBLE SENSE LINE. DEFORMATION OF THE RIGID PART OR LARGE DEFORMATION OF THE FLEXIBLE PART CAN QUICKLY CAUSE LEAKAGE.
CAUTION: USE TWO WRENCHES DURING DISCONNECTION OF THE SENSE LINE, ONE TO MAINTAIN THE FIXED NUT AND THE SECOND ONE TO LOOSEN/TIGHTEN THE SENSE LINE COUPLING.
NOTE: For the test of the engine bleed-air system, Airbus recommends to use bleed test set P/N 98L36103002000 for more accuracy.
NOTE: There is an alternative method to do the check of the fan air valve. The thermostat sense line is disconnected from the thermostat port. An engine bleed test-set (98L36103002000) is then connected to the thermostat port.
Subtask 36-11-00-810-260-I ** ON A/C NOT FOR ALL
A. If the fault symptom is identified by the maintenance message
FAN AIR V 9HA2 or THRM 7170HM2 or SENSE LINE:
  • Do a check of the unions and the clamps of the sense line between the fan-air valve control-thermostat (7170HM) and the fan air valve (9HA2).
   (1) If the unions are loose:
  • TORQUE the unions to between 1.76 and 1.44 m.daN (12.98 and 10.62 lbf.ft ) T.
   (2) If the unions are correctly tightened:
  • Do a check of the filter of the fan-air valve control-thermostat (7170HM).
     (a) If the filter is dirty:
     (b) If the filter is not dirty:
       1 Disconnect the sense line from the fan-air valve control-thermostat (7170HM).
       2 Put a CAP - BLANKING on the union of the sense line of the fan-air valve control-thermostat.
       3 Connection of the test set.
CAUTION: MAKE SURE THAT THE HOSE ASSEMBLY OF THE BLEED TEST SET DOES NOT APPLY TOO MUCH FORCE ON THE FAV SENSE LINE. IF IT APPLIES TOO MUCH FORCE, IT CAN CAUSE DAMAGE TO THE SENSE LINE.
         a Connect a 98D36003000000 with the short bend flexible assembly to the sense line of the fan air valve.
NOTE: For more accuracy you can use the tools that follow in this order:
       4 Slowly pressurize the sense line and make sure that the visual indicator of the fan air valve:
  • Does not start to move before 0.27 bar (4 psi)
  • Moves to the fully open position before or at a maximum of 0.62 bar (9 psi).
NOTE: Read the pressure on the digital pressure gage.
         a If the fan air valve opens fully:
  • Remove the Fan-Air Valve Control-Thermostat (7170HM) AMM 36-11-43-000-001.
  • Do a visual inspection of the O-Ring at the bottom of the Fan-Air Valve Control-Thermostat (7170HM).
  • If you find damage on the O-Ring:
    * Install a new O-RING AIPC 36110606.
    * Install the Fan-Air Valve Control-Thermostat (7170HM) AMM 36-11-43-400-001.
  • If you find no damage on the O-Ring:
    * Install a new O-RING AIPC 36110606.
    * Replace the THERMOSTAT-FAN AIR VALVE CTL [7170HM] AMM 36-11-43-400-001.
         b If the fan air valve does not fully open:
  • Do the functional test of the opening of the fan air valve AMM 36-11-54-720-001.

    * If the test is not OK:
    * - Replace the VALVE-FAN AIR, ENG2 [9HA2] AMM 36-11-54-000-001 and AMM 36-11-54-400-001.

    * If the test is OK:
    * - Disconnect the sense line from the fan-air valve control-thermostat (7170HM2).
    * - Put a CAP - BLANKING on the union of the sense line of the fan air valve control-thermostat.
    * - Connect a 98D36003000000 to the sense line of the fan air valve.
NOTE: For more accuracy you can use the tools that follow in this order:
* - Pressurize the sense line to 2.1 bar (30 psi), then close the shutoff valve of the pressure source.

** If the pressure decreases after 20 seconds:
** - Repair or replace the sense line between the fan-air valve control-thermostat (7170HM) and the fan air valve (9HA2) AMM 36-11-49-000-029 and AMM 36-11-49-400-029.

** If the pressure stays constant after 20 seconds and if the fault continues:
** - Replace the SENSOR-EXCHANGER OUT TEMP, ENG 2 [6HA2] AMM 36-11-17-000-001 and AMM 36-11-17-400-001.
   (3) If the fault continues:
  • Do a check of the wiring ASM 361102 between:
    . Pin A/1 of the fan air valve (9HA2) and pin AA/12A of the BMC2 (1HA2)
    . Pin A/3 of the fan air valve and the ground terminal.
     (a) If the wiring is not correct:
  • Repair the wiring.
     (b) If the wiring is correct:
Subtask 36-11-00-810-260-K ** ON A/C NOT FOR ALL
A. If the fault symptom is identified by the maintenance message
THRM 7170HM2 OR FAN AIR VALVE 9HA2 OR SENSE LINE:
  • Do a check of the unions and the clamps of the sense line between the fan-air valve control-thermostat (7170HM) and the fan air valve (9HA2).
   (1) If the unions are loose:
  • TORQUE the unions to between 1.76 and 1.44 m.daN (12.98 and 10.62 lbf.ft ) T.
   (2) If the unions are correctly tightened:
  • Do a check of the filter of the fan-air valve control-thermostat (7170HM).
     (a) If the filter is dirty:
     (b) If the filter is not dirty:
       1 Disconnect the sense line from the fan-air valve control-thermostat (7170HM).
       2 Put a CAP - BLANKING on the union of the sense line of the fan-air valve control-thermostat.
       3 Connection of the test set.
CAUTION: MAKE SURE THAT THE HOSE ASSEMBLY OF THE BLEED TEST SET DOES NOT APPLY TOO MUCH FORCE ON THE FAV SENSE LINE. IF IT APPLIES TOO MUCH FORCE, IT CAN CAUSE DAMAGE TO THE SENSE LINE.
         a Connect a 98D36003000000 with the short bend flexible assembly to the sense line of the fan air valve.
NOTE: For more accuracy you can use the tools that follow in this order:
       4 Slowly pressurize the sense line and make sure that the visual indicator of the fan air valve:
  • Does not start to move before 0.27 bar (4 psi)
  • Moves to the fully open position before or at a maximum of 0.62 bar (9 psi).
NOTE: Read the pressure on the digital pressure gage.
         a If the fan air valve opens fully:
  • Remove the Fan-Air Valve Control-Thermostat (7170HM) AMM 36-11-43-000-001.
  • Do a visual inspection of the O-Ring at the bottom of the Fan-Air Valve Control-Thermostat (7170HM).
  • If you find damage on the O-Ring:
    * Install a new O-RING AIPC 36110606.
    * Install the Fan-Air Valve Control-Thermostat (7170HM) AMM 36-11-43-400-001.
  • If you find no damage on the O-Ring:
    * Install a new O-RING AIPC 36110606.
    * Replace the THERMOSTAT-FAN AIR VALVE CTL [7170HM] AMM 36-11-43-400-001.
         b If the fan air valve does not fully open:
  • Do the functional test of the opening of the fan air valve AMM 36-11-54-720-001.

    * If the test is not OK:
    * - Replace the VALVE-FAN AIR, ENG2 [9HA2] AMM 36-11-54-000-001 and AMM 36-11-54-400-001.

    * If the test is OK:
    * - Disconnect the sense line from the fan-air valve control-thermostat (7170HM).
    * - Put a CAP - BLANKING on the union of the sense line of the fan-air valve control-thermostat.
    * - Connect a 98D36003000000 to the sense line of the fan air valve.
NOTE: For more accuracy you can use the tools that follow in this order:
* - Pressurize the sense line to 2.1 bar (30 psi) then close the shut-off valve of the pressure source.

** If the pressure decreases after 20 seconds:
** - Repair or replace the sense line between the fan-air valve control-thermostat (7170HM) and the fan air valve (9HA2) AMM 36-11-49-000-029 and AMM 36-11-49-400-029.

** If the pressure stays constant after 20 seconds and if the fault continues:
** - Replace the SENSOR-EXCHANGER OUT TEMP, ENG 2 [6HA2] AMM 36-11-17-000-001 and AMM 36-11-17-400-001.
   (3) If the fault continues:
  • Do a check of the wiring ASM 361102 between:
    . Pin A/1 of the fan air valve (9HA2) and pin AA/12A of the BMC2 (1HA2)
    . Pin A/3 of the fan air valve and the ground terminal.
     (a) If the wiring is not correct:
  • Repair the wiring.
     (b) If the wiring is correct:
Subtask 36-11-00-810-260-L ** ON A/C NOT FOR ALL
A. If the fault symptom is identified by the maintenance message
THRM 7170HM2 OR FAN AIR VALVE 9HA2 OR SENSE LINE:
  • Do a check of the unions and the clamps of the sense line between the fan-air valve control-thermostat (7170HM) and the fan air valve (9HA2).
   (1) If the unions are loose:
  • TORQUE the unions to between 1.76 and 1.44 m.daN (12.98 and 10.62 lbf.ft ) T.
   (2) If the unions are correctly tightened:
  • Do a check of the filter of the fan-air valve control-thermostat (7170HM).
     (a) If the filter is dirty:
     (b) If the filter is not dirty:
       1 Disconnect the sense line from the fan-air valve control-thermostat (7170HM).
       2 Put a CAP - BLANKING on the union of the sense line of the fan-air valve control-thermostat.
       3 Connection of the test set.
CAUTION: MAKE SURE THAT THE HOSE ASSEMBLY OF THE BLEED TEST SET DOES NOT APPLY TOO MUCH FORCE ON THE FAV SENSE LINE. IF IT APPLIES TOO MUCH FORCE, IT CAN CAUSE DAMAGE TO THE SENSE LINE.
         a Connect a 98D36003000000 with the short bend flexible assembly to the sense line of the fan air valve.
NOTE: For more accuracy you can use the tools that follow in this order:
       4 Slowly pressurize the sense line and make sure that the visual indicator of the fan air valve:
  • Does not start to move before 0.27 bar (4 psi)
  • Moves to the fully open position before or at a maximum of 0.62 bar (9 psi).
NOTE: Read the pressure on the digital pressure gage.
         a If the fan air valve opens fully:
  • Remove the Fan-Air Valve Control-Thermostat (7170HM) AMM 36-11-43-000-001.
  • Do a visual inspection of the O-Ring at the bottom of the Fan-Air Valve Control-Thermostat (7170HM).
  • If you find damage on the O-Ring:
    * Install a new O-RING AIPC 36110606.
    * Install the Fan-Air Valve Control-Thermostat (7170HM) AMM 36-11-43-400-001.
  • If you find no damage on the O-Ring:
    * Install a new O-RING AIPC 36110606.
    * Replace the THERMOSTAT-FAN AIR VALVE CTL [7170HM] AMM 36-11-43-400-001.
         b If the fan air valve does not fully open:
  • Do the functional test of the opening of the fan air valve AMM 36-11-54-720-001.

    * If the test is not OK:
    * - Replace the VALVE-FAN AIR, ENG2 [9HA2] AMM 36-11-54-000-001 and AMM 36-11-54-400-001.

    * If the test is OK:
    * - Disconnect the sense line from the fan-air valve control-thermostat (7170HM2).
    * - Put a CAP - BLANKING on the union of the sense line of the fan-air valve control-thermostat.
    * - Connect a 98D36003000000 to the sense line of the fan air valve.
NOTE: For more accuracy you can use the tools that follow in this order:
* - Pressurize the sense line to 2.1 bar (30 psi), then close the shutoff valve of the pressure source.

** If the pressure decreases after 20 seconds:
** - Repair or replace the sense line between the fan-air valve control-thermostat (7170HM) and the fan air valve (9HA2) AMM 36-11-49-000-820 and AMM 36-11-49-400-820.

** If the pressure stays constant after 20 seconds and if the fault continues:
** - Replace the SENSOR-EXCHANGER OUT TEMP, ENG 2 [6HA2] AMM 36-11-17-000-001 and AMM 36-11-17-400-001.
   (3) If the fault continues:
  • Do a check of the wiring ASM 361102 between:
    . Pin A/1 of the fan air valve (9HA2) and pin AA/12A of the BMC2 (1HA2)
    . Pin A/3 of the fan air valve and the ground terminal.
     (a) If the wiring is not correct:
  • Repair the wiring.
     (b) If the wiring is correct:
Subtask 36-11-00-710-421-A ** ON A/C NOT FOR ALL
B. Test
   (1) Do the operational test of the bleed air system AMM 36-11-00-710-003.
   (2) After the subsequent flight, make sure that the fault does not continue.
[Rev.8 from Aug 2018] 2026.04.04 04:33:40 UTC
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