If the FDAU has a fault with the process of data for the aircraft conditioning monitoring system (ACMS), the ACMS light comes on.
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TEST SWITCH
OFF LIGHT
MASTER
CAUTION
MASTER CAUTION LIGHT (2)
PUSH TO RESET
MACH
FLIGHT RECORDER
AIRSPEED
WARNING
ANTI-ICE
ENG
TEST
TEST NORMAL
NO 1 NO 2
HYD
OVERHEAD
OFF
OVERHEAD ANNUNCIATOR
A
DOORS
AIR COND
FLIGHT RECORDER/MACH AIRSPEEDWARNING TEST MODULE
ACMS
DFDR
CAGE CODE: 97895 PN: 967-0212
ACMS
WEIGHT 19.0 LBS (8.63 KGS) MAX
DFDAU
DFDR
POWER: 35W MAX, 115V. 400HZ
SERIAL NO. MFR DATE
DFDAU MOD STATUS
1 23456 7 8910
DFDAU ACMS
11 12 13 14 15 16 17 18 19 20
FDAU FAULT LIGHTS
FDR BITE LIGHT
FLIGHT DATA RECORDER FLIGHT DATA ACQUISITION UNIT
FDRS - SYSTEM TESTS
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FDRS - TRAINING INFORMATION POINT - FDAU BITE THIS PAGE INTENTIONALLY LEFT BLANK
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FDRS -TRAINING INFORMATION POINT - FDAU BITE General
The FDAU has built-in test equipment (BITE) and self-test software. BITE does these functions:
-Causes the fault lights to come on
-Shows the failure codes
-Holds fault messages.
PCMCIA Drive and Cards
The FDAU also has two slots for Personal Computer Memory Card International Association (PCMCIA) cards. You can put a card in either slot. To eject the card, push the eject switch above the card. The PCMCIA cards can do these functions:
-Load software into the FDAU
-Store FDAU data.
To load software, put the card with the software in either PCMCIA slot. The FDAU turns on the IN PROG LED. When the transfer is complete, the FDAU turns on the XFER COMP LED. You can remove the card. If the software transfer fails, the FDAU turns on the XFER FAIL LED. To transfer data to a data card, put a formatted card in either slot and lower the card holder arm.
The DFM BITE LED comes on if the PCMCIA drive fails.
Fault Lights
The FDAU has these three failure indicator lights on the front panel:
-ACMS
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-DFDR
-DFDAU.
The ACMS light comes on with input faults, DMU master controller faults, or mass memory faults. The FDAU continues to send data and the FDR continues to store data.
The DFDR FAIL light comes on with a fault in the FDR. The FDAU continues to send data to the FDR.
The DFDAU failure light comes on with a power supply fault, output data fault or erasable programmable read only memory (EPROM) fault in the FDAU. The EPROM holds the program for the FDAU. The FDAU does not send data to the FDR.
BITE Fault Code Display
A seven-digit alphanumeric display shows fault codes if there is a fault in the FDAU. A three-position BITE toggle switch controls the fault code display. Set this switch to the left or right position to do the test. The spring loaded center position is off.
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