Spurious Brake Pressure on Triple Indicator after release of the Parking Brake

TASK 32-45-00-810-810-A
Spurious Brake Pressure on Triple Indicator after release of the Parking Brake

1. Possible Causes

IND-BRK YELLOW PRESS TRIPLE [60GG]
PRESS XDCR-BRK,YELLOW L [63GG]
PRESS XDCR-BRK,YELLOW R [62GG]
PRESS XDCR-BRK, YELLOW L [101GG]
PRESS XDCR-BRK, YELLOW R [100GG]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 324401
AMM 32-44-18-000-001	Removal of the Pressure Transducers
AMM 32-44-18-400-001	Installation of the Pressure Transducers
AMM 32-44-19-000-001	Removal of the Pressure Transducer
AMM 32-44-19-400-001	Installation of the Pressure Transducer
AMM 32-44-21-000-001	Removal of the Brake Yellow Pressure Triple Indicator
AMM 32-44-21-400-001	Installation of the Brake Yellow Pressure Triple Indicator
AMM 32-45-00-710-001	Operational Check of the Parking Brake System

3. Fault Confirmation
Subtask 32-45-00-710-061-A

A. Test
Do the operational test of the parking brake system: AMM 32-45-00-710-001.

NOTE: Make sure that the pistons supplied by the Yellow hydraulic system are in the retracted position after release of the parking brake (PARK BRK control switch 73GG set to OFF).

4. Fault Isolation
Subtask 32-45-00-810-059-A ** ON A/C NOT FOR ALL

A. If the test confirms the fault:
(1) Disconnect the electrical connector from the triple indicator 60GG.
(2) Connect the electrical connector to the triple indicator 60GG.
(3) If the pressure indication on the triple indicator is 0 after reconnection of the indicator:

replace the IND-BRK YELLOW PRESS TRIPLE [60GG] AMM 32-44-21-000-001 AMM 32-44-21-400-001.

(4) If the triple indicator continues to show the spurious pressure indication:
(a) Do a check for VDC signal on 60GG connector between Pin A/F and Pin A/K related to the 63GG (left side) ASM 324401 or
(b) Do a check for VDC signal on 60GG connector between Pin A/J and Pin A/C related to the 62GG (right side) ASM 324401.
(5) If there is VDC signal between Pin A/F and Pin A/K:

replace the PRESS XDCR-BRK,YELLOW L [63GG] AMM 32-44-18-000-001 AMM 32-44-18-400-001

(6) If there is VDC signal between Pin A/J and Pin A/C:

replace the PRESS XDCR-BRK,YELLOW R [62GG] AMM 32-44-18-000-001 AMM 32-44-18-400-001.

Subtask 32-45-00-810-059-B ** ON A/C NOT FOR ALL

replace the IND-BRK YELLOW PRESS TRIPLE [60GG] AMM 32-44-21-000-001 AMM 32-44-21-400-001.

(4) If the triple indicator continues to show the spurious pressure indication:
(a) Do a check for VDC signal on 60GG connector between Pin A/F and Pin A/K related to the 101GG (left side) ASM 324401 or :
(b) Do a check for VDC signal on 60GG connector between Pin A/J and Pin A/C related to the 100GG (right side) ASM 324401.
(5) If there is VDC signal between Pin A/F and Pin A/K:

replace the PRESS XDCR-BRK, YELLOW L [101GG] AMM 32-44-19-000-001 AMM 32-44-19-400-001

(6) If there is VDC signal between Pin A/J and Pin A/C:

replace the PRESS XDCR-BRK, YELLOW R [100GG] AMM 32-44-19-000-001 AMM 32-44-19-400-001.

Subtask 32-45-00-710-062-A

B. Do the test given in Para.3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:31:46 UTC