•
2A-31-60: Central Maintenance Computer System
•
2A-31-70: Monitor and Warning System
•
2A-31-80: Electronic Display System
•
2A-31-90: Weather Radar and Lightning Sensor Systems
3. Controls and Indications:
A. Circuit Breakers (CBs):
The following CBs power the MAUs:
Circuit Breaker Name:
CB Panel
Location:
Power Source:
MAU #1A PRI
POP
A-10
L ESS DC Bus
MAU #1A SEC
CPOP
A-10
R MAIN DC Bus
MAU #1B PRI
CPOP
A-9
R ESS DC Bus
MAU #1B SEC
POP
A-9
L MAIN DC Bus
MAU #2A PRI
CPOP
A-8
R MAIN DC Bus
MAU #2A SEC
POP
A-8
L MAIN DC Bus
MAU #2B PRI
CPOP
A-7
R ESS DC Bus
MAU #2B SEC
POP
A-7
R MAIN DC Bus
MAU #3A PRI
POP
A-6
L MAIN DC Bus
MAU #3A SEC
CPOP
A-6
R MAIN DC Bus
MAU #3B PRI
POP
A-5
L ESS DC Bus
MAU #3B SEC
CPOP
A-5
R MAIN DC Bus
B. Crew Alerting System (CAS) Messages:
The following CAS messages are associated with the MAUs:
Area Monitored
CAS Message
Message Color
AGMs
AGM 1-2-3-4 Fail
Amber
APMs
APM 1-2-3-4 Fail
Amber
APMs
APM Miscompare
Amber
MAU Fans
MAU 1-2-3 Fan Fail
Amber
MAU
MAU 1A-1B-2A-2B-
3A-3B OVRHT
Amber
MAU
MAU 1A-1B-2A-2B-
3A-3B Fail
Amber
AGMs
AGM 1-2-3-4 Fail
Blue
APMs
APM 1-2-3-4 Fail
Blue
NOTE
The listed caution messages may be displayed individually or in various
permutations according to the configuration of the malfunction. For instance, MAU
1A-2B-3A OVRHT or MAU 1B-3A-3B Fail might be displayed if conditions warrant.
Because of the extensive number of message combinations possible, only the
representative root messages are included in this tabulation.
C. Limitations:
There are no limitations specific to the MAUs as of this writing.
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS
2A-31-00
Page 3
July 15/04
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