2A-31-40: Data Management Unit
1. General:
A Honeywell Data Management Unit (DMU) is installed in the pilot side console for
use in uploading navigation and approach plate data to the Flight Management
Systems (FMS), updating the terrain database in the Enhanced Ground Proximity
Warning System (EGPWS), or for maintenance diagnostics. The DMU is
equipped with a tray accommodating Digital Versatile Discs (DVDs) and two (2)
slots for insertion of type II and type III Personal Computer Memory Card
International Association (PCMCIA) flash memory cards. The DMU is illustrated in
Figure 9.
The DMU communicates with components and systems within the PlaneView
avionics suite over a Local Area Network (LAN) connection, with data exchange
operations controlled with the Multi-function Control and Display Units (MCDUs)
or through a Personal Computer (PC) connected to a sub-D outlet on the Test and
Monitor Panel. The database transfer operations are described in Section 2B-23-
00. If a fault is detected within the DMU, DVD or PCMCIA card during the transfer
operation, the MCDU(s) will display a message associated with the fault. A list of
DMU fault messages is contained in Section 2B-34-00.
2. Controls and Indications:
A. Circuit Breaker (CB):
The following CB powers the DMU:
Circuit Breaker Name:
CB Panel:
Location:
Power Source:
DMU
REER
D-5
R MAIN DC Bus
B. Crew Alerting System (CAS) messages:
There are no CAS messages associated with the DMU. See Section
2B-33-00 for MCDU fault messages associated with the DMU and Section
2B-34-00 for a list of DMU fault codes.
3. Limitations:
There are no limitations associated with the DMU as of this writing.
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS
2A-31-00
Page 15
July 15/04
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