W DOC AIRBUS | TSM A320F

F/O Nosewheel-Steering Handwheel Inoperative

TASK 32-51-00-810-804-A
F/O Nosewheel-Steering Handwheel Inoperative

1. Possible Causes
  • XMTR UNIT-N/W STRG HANDWHEEL,F/O [2GC]
  • BSCU [10GG]
  • 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
TSM TASK 32-42-00-03
NORMAL BRAKING - TASK SUPPORTING DATA
3. Fault Confirmation
Subtask 32-51-00-700-052-A
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.
   (3) Read the TROUBLE SHOOTING DATA of the BSCU on the MCDU 32-42-00-03 TSM TASK 32-42-00-03.
4. Fault Isolation
Subtask 32-51-00-810-053-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message FO STEERING HANDWHEEL and if the TROUBLE SHOOTING DATA gives the fault code 49:
   (1) If the fault continues:
   (2) If the fault continues:
  • if the source of the message is BSCU 1, do a check and repair the wiring from the BSCU (10GG) to the handwheel transmitter unit (2GC) pins AA/9K, 15K, 13K to pins A/P, D, R. ASM 325101.
  • If the source of the message is BSCU 2, do a check and repair the wiring from the BSCU (10GG) to the handwheel transmitter unit (2GC) pins AA/9A, 15A, 13A to pins A/U, B, V. ASM 325101
Subtask 32-51-00-810-065-A ** ON A/C NOT FOR ALL
B. If the test gives the maintenance message FO STEERING HANDWHEEL and if the TROUBLE SHOOTING DATA gives the fault code 4B:
   (1) If the fault continues:
   (2) If the fault continues:
  • if the source of the message is BSCU 1, do a check and repair the wiring from the BSCU (10GG) to the handwheel transmitter unit (2GC) pins AA/10K, 1J, 14K to pins A/M, E, N. ASM 325101.
  • if the source of the message is BSCU 2, do a check and repair the wiring from the BSCU (10GG) to the handwheel transmitter unit (2GC) pins AA/10A, 1B, 14A to pins A/S, C, T. ASM 325101
Subtask 32-51-00-810-053-C ** ON A/C NOT FOR ALL
C. If the test gives the maintenance message F/O STEERING HDWHL(2GC)/BSCU(10GG) and if the TROUBLE SHOOTING DATA gives the fault code 791:
   (1) If the fault continues:
   (2) If the fault continues:
  • if the source of the message is BSCU 1, do a check and repair the wiring from the BSCU (10GG) to the handwheel transmitter unit (2GC) pins AA/9K, 15K, 13K to pins A/P, D, R ASM 325101.
  • If the source of the message is BSCU 2, do a check and repair the wiring from the BSCU (10GG) to the handwheel transmitter unit (2GC) pins AA/9A, 15A, 13A to pins A/U, B, V ASM 325101.
Subtask 32-51-00-810-065-C ** ON A/C NOT FOR ALL
D. If the test gives the maintenance message F/O STEERING HDWHL(2GC)/BSCU(10GG) and if the TROUBLE SHOOTING DATA gives the fault code 786:
   (1) If the fault continues:
   (2) If the fault continues:
  • if the source of the message is BSCU 1, do a check and repair the wiring from the BSCU (10GG) to the handwheel transmitter unit (2GC) pins AA/10K, 1J, 14K to pins A/M, E, N ASM 325101.
  • if the source of the message is BSCU 2, do a check and repair the wiring from the BSCU (10GG) to the handwheel transmitter unit (2GC) pins AA/10A, 1B, 14A to pins A/S, C, T ASM 325101.
Subtask 32-51-00-700-053-A
E. Test
   (1) Do the test given in Para. 3.A.(1).
[Rev.8 from Aug 2018] 2026.04.04 04:31:47 UTC
"WTRUIB" 2025