(2)
Alternate pitot system.
(3)
Alternate static system.
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
D. Related Data
(1)
(SSM 34-24-15).
(2)
(WDM 34-24-15).
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
(2)
If the ALT flag does not show on the integrated standby flight display, then there was an intermittent fault.
(3)
If the ALT flag shows on the integrated standby flight display, then do the Fault Isolation Procedure below.
F. Fault Isolation Procedure
(1) Replace the integrated standby flight display, N226. These are the tasks: Integrated Standby Flight Display Removal, AMM TASK 34-24-02-000-801, Integrated Standby Flight Display Installation, AMM TASK 34-24-02-400-801.
EFFECTIVITY
34-24 TASKS 804-805
SIL ALL
Page 203 D633A103-SIL Jun 15/2008
(a)
If the installation task for the integrated standby flight display is satisfactory and the ALT flag does not show, then you corrected the fault.
(b)
If the ALT flag shows on the integrated standby flight display, then continue.
(2) Do a leak test of the alternate pitot and static systems:
(a)
Do this task: Alternate Pitot System Leak Test, AMM TASK 34-11-00-790-812.
(b)
Do this task: Alternate Static System Low-range Leak Test, AMM TASK 34-11-00-790-808.
(c)
If the alternate pitot or alternate static system has a leak, then do these steps: 1) Repair the leak. 2) Do this task: Integrated Standby Flight Display -System Test, AMM
TASK 34-24-02-730-801. a) If the operational test is satisfactory and the ALT flag does not show on the integrated standby flight display, then you corrected the fault.
-------------------------END OF TASK ---------------------------
806. ATT Flag on Integrated Standby Flight Display -Fault Isolation
A. Description
(1) The ATT flag shows when the integrated standby flight display shows an invalid attitude.
B. Possible Causes
(1) Integrated standby flight display, N226.
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
D. Related Data
(1)
(SSM 34-24-15).
(2)
(WDM 34-24-15).
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
(2)
If the ATT flag does not show on the integrated standby flight display, then there was an intermittent fault.
(3)
If the ATT flag shows on the integrated standby flight display, then do the Fault Isolation Procedure below.
F. Fault Isolation Procedure
(1) Replace the integrated standby flight display, N226.
EFFECTIVITY
34-24 TASKS 805-806
SIL ALL
Page 204 D633A103-SIL Jun 15/2008
These are the tasks:
Integrated Standby Flight Display Removal, AMM TASK 34-24-02-000-801,
Integrated Standby Flight Display Installation, AMM TASK 34-24-02-400-801.
(a) If the installation task for the integrated standby flight display is satisfactory and the ATT flag does not show, then you corrected the fault. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-600/700/800/900 FAULT ISOLATION MANUAL 故障隔离手册 导航(83)
