TCAS连续两个航后都出现TCAS FAULT,但地面测试正常。不知什么

simble · 发表于 2012-6-30 16:35:24

根据TSM，现在把TCAS换了，不知下个航班怎么样？
Internal Failure of the TCAS

1.	Possible Causes

-	CMPTR-TCAS ( 1SG )

-	wiring between the TCAS computer and the first ground terminal

-	wiring between the circuit breaker (4SG) and the TCAS computer

-	wiring between the TCAS computer and the LGCIU1

-	LGCIU1 ( 5GA1 )

2.	Job Set-up Information

A.	Referenced Information

REFERENCE	DESIGNATION
AMM 32-31-71-000-801	Removal of the LGCIU
AMM 32-31-71-400-801	Installation of the LGCIU
AMM 34-43-00-740-801	BITE test of the Traffic Collision Avoidance System (TCAS)
Ref. ASM 34-43-01
AMM 34-43-34-000-801	Removal of the Traffic Collision Avoidance System (TCAS) Computer
AMM 34-43-34-400-801	Installation of the Traffic Collision Avoidance System (TCAS) Computer

3.	Fault Confirmation

Subtask 34-43-00-740-050-A

A.

Test

Do the BITE test of the TCAS AMM 34-43-00-740-801.

4.	Fault Isolation

Subtask 34-43-00-810-050-A

A.	If the test gives the maintenance message TCAS (1SG):

-	remove the CMPTR-TCAS ( 1SG ) AMM 34-43-34-000-801.

-	do a check for a ground signal at pin AC/7 of the TCAS computer

(1)	If there is no ground signal:

-	do a check and repair the wiring between the TCAS computer and the first ground terminal : pin AC/7 of the TCAS computer Ref. ASM 34-43-01

-	install the TCAS computer AMM 34-43-34-400-801.

707766054 · 发表于 2012-6-30 20:29:15

可能是软件问题

hutks · 发表于 2012-6-30 22:25:48

TCAS故障分为两类：

1． TCAS计算机内部和外部接口出现的故障，可以在TCAS计算机面板上看到相应故障信息；

2．为空地离散或单边DEU给出的RA STATUS不正确引起，可通过相应测试判断。

地面测试均正常，可能性为TCAS计算机性能不稳定.

深秋黎明 · 发表于 2012-6-30 23:29:24

是不是线路的问题，

毛茸茸的山桃 · 发表于 2012-7-1 01:15:08

把ATC天线换了，波音有关于这个方面的维护提示，跟你说的情况类似，空中出现，地面不能重现。另外FIM里面有教你怎么在收发机上查看故障历史的

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[A330] TCAS连续两个航后都出现TCAS FAULT,但地面测试正常。不知什么