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B
Confirm the pitch and roll attitude source and measure the inputs at
the KMH/KTA Processor.
The TAS and attitude should be operating normally for the following
test.
Connect the Diagnostic Computer to the KMH/KTA through the
RS-232 port. Run the TASDIAG Input Data program and observe the
following on the computer screen.
Monitor the attitude source in the cockpit. Observe the Pitch and Roll
attitude readouts. The computer screen readouts should agree to
within a few degrees of the cockpit heading display. Record a pitch and
roll attitude other than (0.0°) ______. Is it consistent with the aircraft's
attitude?
The Pitch and Roll Status on the computer should indicate VALID.
Flag the attitude source by pulling the circuit breaker.
Verify that the Pitch and Roll Status goes INVALID.
Verify that the "TAS" flag appears on the traffic display.
Reset the circuit breaker. Verify that the "TAS" flag clears.
Pass/Fail ______.
6.
If applicable, verify that the Radio Altimeter is properly interfaced to the
TAS Processor. Confirm the radio altitude configuration straps and
measure the input at the KMH/KTA Processor.
The TAS and radio altitude source(s) should be operating normally for
the following test. Connect the Diagnostic Computer to the TAS
through the RS-232 port. Run the TASDIAG Input Data program and
observe the following on the computer.
Monitor the radio altitude source in the cockpit. Observe the Radio
Altitude readout. The computer readout should agree with the cockpit
radio altimeter indicator. If the computer display is too erratic, measure
the voltage with an alternative test.
The Rad. Alt. Status on the computer should indicate VALID
Using the radio altimeter self-test, confirm the following:
Rev 3, August/2002
10609I03 CDL
KMH 880/KTA 870
Page 4-31
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