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AUTOMATIC SYSTEM TEST
AVIATION VIBRATION ANALYZER
4. A self-test is automatically performed every time the DAU is powered up. This power-up test takes approximately
two seconds to complete. This tests the unit's basic operation and ability to make measurements. If a test fails, a
failure error message appears on the CADU screen.
5. A self-test is automatically performed at 24-hour intervals. This test takes approximately ten seconds to
complete. Results are stored in memory and are used to correct measured data.
6. The following procedures will verify basic operation of the AVA system.
Connected for normal operation
a. Connect external power to the DAU.
b. Connect the DAU and CADU using the CADU-to-DAU cable.
c. Turn on DAU.
d. Verify DAU power lamp turns on.
e. Reboot CADU by pressing DO and QUIT.
f. Verify CADU comes up in startup screen and then press Option 1.
g. Select an aircraft type (any).
h. Verify proper aircraft type is present in the CADU.
i. Select a tail number (any).
j. Select a FLIGHT Flight Plan.
k. Select MEASURE Mode (press F1 key).
I. Make a measurement by pressing DO two times.
m. Verify CADU returns a tachometer fault type message.
n. If another fault message is returned, consult the error codes (WP0021 00-8 to 23) for corrective action.
END OF WORK PACKAGE