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B
• No "TAS" flag annunciation.
• "TAS STBY".
• If installed, the TA/VSI vertical speed needle should indicate 0 fpm.
Check that the brightness of the traffic display can be controlled by the
appropriate control. Brightness of the traffic display may be controlled by
the aircraft dimmer switch or by the BRT control on the display unit.
On the TAS Control Unit, select the ON position. The following conditions
should exist:
• The traffic display should indicate "TA" or "TA ONLY".
• No faults or fail annunciations are present on the traffic display.
• Traffic may be displayed on the traffic display depending on the
• TAS strapping configuration and whether traffic exists in the area.
• Non-threat Traffic, displayed as an open white diamond.
• Proximity Intruder Traffic, displayed as a filled white diamond.
• Traffic Advisory (TA) traffic, displayed as a yellow circle.
D.
Perform the Self-test by initiating the TAS System Self-test on the TAS Con-
trol Panel. The following events should occur during the test period:
On the traffic display, a test pattern will be displayed that allows verification
of each type of intruder symbol that can be displayed. During the self-test,
the word "TEST" is displayed on the display. The following symbols are dis-
played:
• Traffic Advisory (yellow circle) will appear at 9 o'clock, range of 2 miles,
200 feet below and climbing.
• Proximity traffic (solid white diamond) will appear at 1 o'clock, range 3.6
miles, 1000 feet below and descending.
• Non-threat traffic (open white diamond) will appear at 11 o'clock, range
of 3.6 miles, flying level 1000 feet above.
At the conclusion of a successful self-test, a synthesized voice announces,
"TAS System Test OK". Should a failure be detected during self-test, the
audio message says, "TAS System Test Fail".
E.
Perform the Ground Test.
Ground tests are necessary to meet the requirements of DRAFT AC 20
ZZZ. While the tests are organized in a sequential fashion, they may be
completed in a random order to accommodate other conditions. The per-
son performing these tests should be familiar with the TAS equipment, the
aircraft installation and the supporting test equipment.
Rev 3, August/2002
10609I03.CDL
KMH 880/KTA 870
Page 4-24
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