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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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ARINC 429 DATA BUS WORD 350 MAINTENANCE CODE DEFINITION TABLE

ARINC 429 DATA BUS WORD 350 MAINTENANCE CODE DEFINITION TABLE
BIT DEFINITION

1
2		 Octal 3:
1
1

3
4
5		 Octal 5:
1
0
1

6
7
8		 Octal 0:
0
0
0

9
10
 Source/Destination Identifier - (Bit 10 is MSB and Bit 9 is LSB):
Bit 10 = 0 and Bit 9 = 0 for Not Used
Bit 10 = 0 and Bit 9 = 1 for Left Unit (modulation frequency strapped for 50 Hz)
Bit 10 = 1 and Bit 9 = 0 for Right Unit (modulation frequency strapped for 51 Hz)
Bit 10 = 1 and Bit 9 = 1 for Center Unit (modulation frequency strapped for 49 Hz)
11 0 = Altimeter OK, 1 = Altimeter Error
12 0 = RAM OK, 1 = RAM Error
13 0 = ROM OK, 1 = ROM Error
14 Reserved
15 Reserved
16 Reserved
17 Fault code, refer to ARINC 429 Data Bus Word 350 Diagnostic Code Definitions Table for description
18 Fault code, refer to ARINC 429 Data Bus Word 350 Diagnostic Code Definitions Table for description
19 Fault code, refer to ARINC 429 Data Bus Word 350 Diagnostic Code Definitions Table for description
20 Fault code, refer to ARINC 429 Data Bus Word 350 Diagnostic Code Definitions Table for description
21 Fault code, refer to ARINC 429 Data Bus Word 350 Diagnostic Code Definitions Table for description
22 Fault code, refer to ARINC 429 Data Bus Word 350 Diagnostic Code Definitions Table for description
23 Fault code, refer to ARINC 429 Data Bus Word 350 Diagnostic Code Definitions Table for description
24 Fault code, refer to ARINC 429 Data Bus Word 350 Diagnostic Code Definitions Table for description
25 Reserved
26 Reserved
27 0 = Maintenance log not full, 1 = Maintenance log full
28 0 = Maintenance log has no data, 1 = Maintenance log has data
29 Reserved

30
31
 Sign/Status Matrix - (Bit 31 is MSB and Bit 30 is LSB):
Bit 31 = 0 and Bit 30 = 0 for Failure Warning
Bit 31 = 0 and Bit 30 = 1 for No Computed Data
Bit 31 = 1 and Bit 30 = 0 for Functional Test
Bit 31 = 1 and Bit 30 = 1 for Normal Operation
32 Parity Bit (UART set for odd parity)
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