W DOC AIRBUS | TSM A320F

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

TASK 36-11-00-810-848-A
Fan Air Valve of the Engine 2 Not in Fully Open Position

1. Possible Causes
  • THERMOSTAT-FAN AIR VALVE CTL [7170HM]
  • 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
98L36103002000
1
TEST SET - ENGINE BLEED
 B. Referenced Information
REFERENCE
DESIGNATION
AMM 36-11-00-710-003
Operational Test of the Bleed Air System
ASM 361102
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 36-11-00-710-140-A ** ON A/C NOT FOR ALL
A. 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.
Subtask 36-11-00-810-096-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 the unions and 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 them 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 If the fan air valve does not fully open:
       2 If the fan air valve fully opens:
  • 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 98L36103002000 TEST SET - ENGINE BLEED to the sense line from the fan air valve.
NOTE: For more accuracy you can use the tools that follow in this order:
  • Pressurize the sense line to 2.07 bar (30 psi), then close the shutoff valve of the pressure source.
         a If the pressure decreases after 20 seconds:
         b If the pressure stays constant after 20 seconds:
   (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 36-11-00-810-096-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 them 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 If the fan air valve does not fully open:
       2 If the fan air valve opens fully:
  • 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 98L36103002000 TEST SET - ENGINE BLEED to the sense line from 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.
         a If the pressure decreases after 20 seconds:
         b If the pressure stays constant after 20 seconds:
   (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 36-11-00-810-096-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 them 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 If the fan air valve does not fully open:
       2 If the fan air valve opens fully:
  • 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 98L36103002000 TEST SET - ENGINE BLEED to the sense line from 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.
         a If the pressure decreases after 20 seconds:
         b If the pressure stays constant after 20 seconds:
   (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 36-11-00-710-141-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 04:33:45 UTC
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