- replace the SERVOVALVE-NORM BRK WHEEL 1 (15GG) (Ref. AMM TASK 32-42-48-000-001) (Ref. AMM TASK 32-42-48-400-001)
(2) if the test is ok:
- replace the BSCU (10GG). (Ref. AMM TASK 32-42-34-000-001) (Ref. AMM TASK 32-42-34-400-001)
(a) 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 wheel 1- norm brake servovalve (15GG) pins AB/9K, 9J to pins A/C, A. (Ref. ASM 32-42/02)
- if the source of the message is BSCU 2, do a check and repair the wiring from the BSCU (10GG) to the wheel 1- norm brake servovalve (15GG) pins AB/9A, 9B to pins A/F, E. (Ref. AM 324202S01)
**ON A/C ALL
C. Do the test given in Para. 3.A.
TASK 32-42-00-810-806
Electrical or hydraulic failure of the Normal Brake Servovalve 17GG.
1. Possible Causes
_______________
- SERVOVALVE-NORM BRK WHEEL 2 (17GG)
- PRESS XDCR-NORM BRK WHEEL 2 (13GG)
- BSCU (10GG)
- wiring from the BSCU (10GG) to the wheel 2 norm brake servovalve (17GG)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 32-42-00-710-001 Operational Check of the Normal Braking System AMM 32-42-21-000-001 Removal of the Normal-Brake Pressure Transducer AMM 32-42-21-400-001 Installation of the Normal-Brake Pressure Transducer AMM 32-42-34-000-001 Removal of the Braking/Steering Control Unit (BSCU)
(10GG) AMM 32-42-34-400-001 Installation of the Braking/Steering Control Unit
(BSCU) (10GG)
AMM 32-42-48-000-001 Removal of the Normal Brake Servovalve
AMM 32-42-48-400-001 Installation of the Normal Brake Servovalve
AMM 32-46-00-740-002 BITE Test of the BSCU - Ground Scanning
AMM 32-46-00-740-005 BITE Test of the Normal Braking System
ASM 32-42/02
TSM 32-42-00 P.Block 301 NORMAL BRAKING
3. Fault Confirmation
__________________
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 301-399,
A. Test
(1) Do the operational test of the normal braking system (Ref. AMM TASK 32-42-00-710-001).
(2) Do the ground scanning of the BSCU during the operational test of the normal braking system (Ref. AMM TASK 32-46-00-740-002).
(3) Read the TROUBLE SHOOTING DATA of the BSCU on the MCDU (Ref. 32-42-00, P. Block 301)
R **ON A/C 106-149, 221-299, 401-499,
A. Test
(1) Do the BITE test of the Normal Braking System. (Ref. AMM TASK 32-46-00-740-005)
(2) Read the TROUBLE SHOOTING DATA of the BSCU on the MCDU. (Ref. TSM 32-42-00 P.Block 301)
**ON A/C ALL
4. Fault Isolation
_______________
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-220, 301-399,
A. If the test gives the maintenance message BRK NORM SERVOVALVE 17GG and the TROUBLE SHOOTING DATA gives the fault code 1F:
- replace the SERVOVALVE-NORM BRK WHEEL 2 (17GG), (Ref. AMM TASK 32-42-48-000-001) and (Ref. AMM TASK 32-42-48-400-001).
(1) If the fault continues:
- replace the PRESS XDCR-NORM BRK WHEEL 2 (13GG) (Ref. AMM TASK 32-42-21-000-001) and (Ref. AMM TASK 32-42-21-400-001).
B. If the test gives the maintenance message BRK NORM SERVOVALVE 17GG and the TROUBLE SHOOTING DATA gives the fault code 1B:
- do a continuity/resistance test at the servovalve.The resistance must be between 90 and 100 ohms.
(1) If the test is not OK:
- replace the SERVOVALVE-NORM BRK WHEEL 2 (17GG) (Ref. AMM TASK 32-42-48-000-001) (Ref. AMM TASK 32-42-48-400-001)
(2) If the test is OK:
- replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) (Ref. AMM TASK 32-42-34-400-001)
(a) 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 wheel 2 norm brake servovalve (17GG) pins AB/10K, 10J to pins A/C, A. (Ref. ASM 32-42/02)
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