Honeywell BENDIX KING KMH 880 System Installation Manual page 188

B
R. Set the pitot-stat test set to -1000 feet, exercise caution to avoid excessive
pressure changes to the static system of the aircraft. Verify that the PC dis-
play shows the item named Gillham Alt ft. at -1000 feet ± 100 feet.
S. Set up the pitot-static test set to allow an ascent to 30,000 feet, or to the
maximum altitude of the lowest rated device attached to the static system.
If, for example, the aircraft uses a blind encoder rated to 25,000 feet; the
altitude to climb to would be 25,000 feet.
You must verify that all equipment connected to the static system can safely
be driven to your test altitude. If you go above 30,750 feet, the Gillham Alti-
tude displayed on your PC will start going backwards. This is normal
because the EGPWS does not use Gillham Code line D4. At altitudes
above 18,000 feet, the EGPWS uses GPS altitude for calculations.
T. Start an ascent at 3,000 feet per minute while monitoring the item named
Gillham Alt ft. At approximately a 2-second rate the displayed altitude
should increase by 100 feet. Make absolutely certain that the altitude
always increases; never goes backwards and never skips a 100 foot incre-
ment. You can record this test using the data collection feature of Win-
Views.
This will allow you to look through the data after the test using a text editor.
This test verifies that the barometric altitude source is working correctly and
that the wiring is correct. Troubleshoot anomalies discovered during this
test.
U. Return the static test set and aircraft static system to the local ambient
pressure.
V. If installed, press the Terrain Inhibit switch and verify that the item named
TerrDis switches between true and false on your PC's display.
W. This completes the Ground Test of the EGPWS.
4.3.3 (TAS) Ground Test Procedure
Installation of the TAS System requires three stages of testing to ensure the proper oper-
ation of the TAS System components. Initially, before installation of the TAS processor
and display units, a system interwiring check is performed. This check verifies that the
aircraft and all TAS System interconnections are correct, before power is applied. After
the units are installed, a visual inspection of the equipment and connections is made.
The Post-installation test is used to apply power and functionally check out the system.
Successful completion of the post-installation test verifies the proper operation of the
KMH/KTA Traffic Advisory System.
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KMH 880/KTA 870
Rev 0, October/2000