W DOC AIRBUS | TSM A320F

Pushbutton of the F/O Nosewheel-Steering Handwheel Inoperative

TASK 32-51-00-810-806-A
Pushbutton of the F/O Nosewheel-Steering Handwheel Inoperative

1. Possible Causes
  • XMTR UNIT-N/W STRG HANDWHEEL,F/O [2GC]
  • BSCU [10GG]
  • wiring from the handwheel transmitter unit (2GC) pin A/K to the ground terminal
  • wiring from the BSCU (10GG) to the handwheel transmitter unit (2GC)
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 32-42-34-000-001
Removal of the Braking/Steering Control Unit (BSCU)
AMM 32-42-34-400-001
Installation of the Braking/Steering Control Unit (BSCU)
AMM 32-46-00-740-001
BITE Test of the BSCU
ASM 325101
AMM 32-51-11-000-001
Removal of the Transmitter Unit - Nose-Wheel Steering Handwheel
AMM 32-51-11-400-001
Installation of the Transmitter Unit - Nose-Wheel Steering Handwheel
3. Fault Confirmation
Subtask 32-51-00-700-059-A ** ON A/C NOT FOR ALL
A. Test
   (1) Do a reset of the BSCU with the A/SKID AND NOSE WHEEL switch (5GG).
   (2) Do the BITE test of the BSCU AMM 32-46-00-740-001.
     (a) If the test gives the maintenance message F/O STEERING HANDWHEEL or BSCU, go to the Para. Fault Isolation.
     (b) If the test does not give the maintenance message F/O STEERING HANDWHEEL or BSCU, but the fault continues:
       1 On the center pedestal, on the MCDU, push the line key adjacent to the STEERING DATA indication.
       2 Push the right or left rudder pedal fully and hold it in position.
       3 On the MCDU, push the line key adjacent to the REFRESH indication.
         a If, on the STEERING DATA page, the STEER ORDER is equal to 0 degrees:
  • Go to the Para. Fault Isolation 4.B.
         b If, with the handwheel pushbutton switch pushed, the STEER ORDER indication on the STEERING DATA page is equal to:
  • +6 degrees for the left rudder pedal, or
  • -6 degrees for the right rudder pedal:
         c Go to the Para. Fault Isolation 4.B.
Subtask 32-51-00-700-059-B ** ON A/C NOT FOR ALL
A. Test
   (1) Do a reset of the BSCU with the A/SKID AND NOSE WHEEL switch (5GG).
   (2) Do the BITE test of the BSCU AMM 32-46-00-740-001.
     (a) If the test gives the maintenance message F/O STEERING HANDWHEEL/BSCU (10GG), go to the Para. Fault Isolation.
     (b) If the test does not give the maintenance message F/O STEERING HANDWHEEL/BSCU (10GG), but the fault continues:
       1 On the center pedestal, on the MCDU, push the line key adjacent to the SYSTEM DATA indication to get page 3/3.
         a Push the right or left rudder pedal fully and hold it in position.
         b If, on the SYSTEM DATA page 3/3, the rudder-pedal order value is equal to (-----):
NOTE: This value is shown below the REFRESH indication.
  • Go to the Para. Fault Isolation 4.B.
         c If, with the handwheel pushbutton switch pushed, the rudder-pedal angle value shown below the REFRESH indication on the SYSTEM DATA page 3/3 is equal to:
  • +31 degrees for the left rudder pedal, or
  • -31 degrees for the right rudder pedal:
         d Go to the Para. Fault Isolation 4.B.
Subtask 32-51-00-700-059-C ** ON A/C NOT FOR ALL
A. Test
   (1) Do a reset of the BSCU with the A/SKID AND NOSE WHEEL switch (5GG).
   (2) Do the BITE test of the BSCU AMM 32-46-00-740-001.
     (a) If the test gives the maintenance message F/O STEERING HANDWHEEL/BSCU (10GG), go to the Para. Fault Isolation.
     (b) If the test does not give the maintenance message F/O STEERING HANDWHEEL/BSCU (10GG), but the fault continues:
       1 On the center pedestal, on the MCDU, push the line key adjacent to the SYSTEM DATA indication to get page 3/3.
         a Push the right or left rudder pedal fully and hold it in position.
         b If, on the SYSTEM DATA page 3/3, the rudder-pedal order value is equal to (-----):
NOTE: This value is shown below the REFRESH indication.
  • Go to the Para. Fault Isolation 4.B.
         c If, with the handwheel pushbutton switch pushed, the rudder-pedal angle value shown below the REFRESH indication on the SYSTEM DATA page 3/3 is equal to:
  • +32 degrees for the left rudder pedal, or
  • -32 degrees for the right rudder pedal:
         d Go to the Para. Fault Isolation 4.B.
4. Fault Isolation
Subtask 32-51-00-810-055-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message F/O STEERING HANDWHEEL:
   (1) Replace the XMTR UNIT-N/W STRG HANDWHEEL,F/O [2GC] AMM 32-51-11-000-001 and AMM 32-51-11-400-001.
   (2) If the fault continues:
   (3) If the fault continues:
  • Do a check for a ground signal at pin A/K of the handwheel transmitter unit (2GC) ASM 325101.
     (a) If there is no ground signal:
  • Repair the wiring from the handwheel transmitter unit (2GC) pin A/K to the ground terminal ASM 325101.
     (b) If there is a ground signal:
  • Do a check and repair the wiring from the BSCU (10GG) to the handwheel transmitter unit (2GC) pins AA/10F, 9F to A/H, J ASM 325101.
   (4) Do the test given in Para. Fault Confirmation.
Subtask 32-51-00-810-055-B ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message F/O STEERING HDWHL(2GC)/BSCU(10GG):
   (1) Replace the XMTR UNIT-N/W STRG HANDWHEEL,F/O [2GC] AMM 32-51-11-000-001 and AMM 32-51-11-400-001.
   (2) If the fault continues:
   (3) If the fault continues:
  • Do a check for a ground signal at pin A/K of the handwheel transmitter unit (2GC) ASM 325101.
     (a) If there is no ground signal:
  • Repair the wiring from the handwheel transmitter unit (2GC) pin A/K to the ground terminal ASM 325101.
     (b) If there is a ground signal:
  • Do a check and repair the wiring from the BSCU (10GG) to the handwheel transmitter unit (2GC) pins AA/10F, 9F to A/H, J ASM 325101.
   (4) Do the test given in Para. Fault Confirmation.
Subtask 32-51-00-810-112-A
B. If the test does not give any maintenance messages related to the steering handwheel and the fault continues:
   (1) If the fault continues:
  • Do a check for continuity and short to ground, and repair the wiring ASM 325101 between:
. Pin AA/10F of the BSCU (10GG) and pin A/H of the transmitter unit (2GC) of the F/O nose-wheel steering-handwheel
. Pin AA/9F of the BSCU (10GG) and pin A/J of the transmitter unit (2GC) of the F/O nose-wheel steering-handwheel.
   (2) Do the test given in Para. Fault Confirmation.
[Rev.8 from Aug 2018] 2026.04.04 04:31:48 UTC
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