(3)  
If the next flight does not produce a report that the integrated standby flight attitude display following takeoff is different from the known attitude and no flag is displayed, you corrected the fault.

-------------------------END OF TASK ---------------------------
815.  ISFD Dedicated Battery System Fault Light is On -Fault Isolation
A.  Description
(1)  The Fault light on the face of the ISFD dedicated battery system is on.
B.  Possible Causes
(1)  
ISFD dedicated battery pack.

(a)  Voltage levels in the cells of the battery are not equal.

(2)  
ISFD dedicated battery system, M2100.

(a)  
Battery charger operating temperature is more than 1808(83C) or less than 58(-15C).

(b)  
Battery charger does not provide the correct output voltage.

C.  Circuit Breakers
(1)  This is the primary circuit breaker related to the fault:
CAPT Electrical System Panel, P18-2
Row Col Number Name
D 8 C01551 ISFD

SIL 001-004, 006, 007, 009-013, 016-019, 021, 101
(a)  Front of the Dedicated Battery System, M2100, E1-3
1) DBC Output breaker

SIL 005, 008, 014, 015, 020, 102-999
(b)  Front of the Dedicated Battery System, M2100, E4–1
1) DBC Output breaker

SIL ALL
D.  Related Data
(1)
(SSM 34-24-15).

(2)
(WDM 34-24-15).

EFFECTIVITY

34-24 TASKS 814-815
SIL ALL
Page 215 D633A103-SIL Jun 15/2010

E.  Initial Evaluation
(1)  Make sure that this circuit breaker is closed:
CAPT Electrical System Panel, P18-2
Row Col Number Name
D 8 C01551 ISFD

SIL 001-004, 006, 007, 009-013, 016-019, 021, 101
(a)  Front of the Dedicated Battery System, M2100, E1-3
1) DBC Output breaker

SIL 005, 008, 014, 015, 020, 102-999
(b)  Front of the Dedicated Battery System, M2100, E4–1
1) DBC Output breaker

SIL ALL
(2)  
If the FAULT light on the face of the ISFD dedicated battery system is not on, then there was an intermittent fault.

(3)  
If the FAULT light on the front of the dedicated battery system is on, then do the Fault Isolation Procedure below.

F. Fault Isolation Procedure
(1)
Replace the ISFD dedicated battery pack. These are the tasks: ISFD Dedicated System and Battery Pack Removal, AMM TASK 34-24-03-000-801, ISFD Dedicated Battery System and Battery Pack Installation, AMM TASK 34-24-03-400-801.

(a)  
If the test in the installation task for the ISFD dedicated battery system is satisfactory and the FAULT light on the face of the dedicated battery charger is not on, then you corrected the fault.

(b)  
If the FAULT light on the face of the ISFD dedicated battery system is on, then continue.

(2)
Replace the ISFD dedicated battery system, M2100. These are the tasks: ISFD Dedicated System and Battery Pack Removal, AMM TASK 34-24-03-000-801, ISFD Dedicated Battery System and Battery Pack Installation, AMM TASK 34-24-03-400-801.

(a)  
If the test in the installation task for the ISFD dedicated battery system is satisfactory and the FAULT light on the face of the dedicated battery charger is not on, then you corrected the fault.

(b)  
If the FAULT light on the face of the ISFD dedicated battery system is on, then continue.

(3)  
Do this check of the wiring between the circuit breaker C1551 and the ISFD dedicated battery charger, M2100:

(a)  
Remove the ISFD dedicated battery system. To remove it, do this task: ISFD Dedicated System and Battery Pack Removal, AMM TASK 34-24-03-000-801.

(b)  
Disconnect the connector D41807P from the P18-2 panel.
　
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