MD-11 Flight Crew Operations Manual
k
Aircraft General -
Description and Operation
Agen.10.31
Centralized Fault Display System
The Centralized Fault Display System (CFDS) provides maintenance checkout
and fault isolation for selected aircraft sub-systems. A Centralized Fault Display
Interface Unit (CFDIU) controls the transmission of data between reporting LRUs
and the MCDU. The reporting LRUs continuously send data to the CFDIU. The
CFDIU then sends this data to the MCDU for display (if selected by maintenance
personnel). The CFDIU stores maintenance data for the current flight leg which
the MCDU can access. The CFDIU is also a reporting LRU to the CFDS.
The 3 modes of data transmission between the CFDIU and the reporting LRUs are
as follows:
• LRUs automatically send faults to the CFDIU.
• Maintenance personnel communicate with an LRU through the MCDU.
• GMT, date, and flight number are sent to the reporting LRUs.
Normally, MCDU-3 on the aft pedestal is used to access CFDS data, however,
MCDU-1 and MCDU-2 on the forward pedestal can also be used.
The MCDU has a keypad and display screen which maintenance personnel use to:
• Access LRU maintenance data.
•Start LRU BIT tests.
• Print data on the screen.
• Send data to ACARS for downlink to a ground station.
October 02, 2006
To Next Page
Loading...