GH-3100
Installation & Operation Manual
TP-559
Installation Checkout
Page 3-9
Revision K
March 30, 2017
5.
Use the air data test set to provide an adequate increasing (higher/positive) airspeed rate of change to
observe airspeed tape operation. Observe and record the air speed tape information as shown in
Table 3-1.
NOTE
If static source error correction is programmed, computed air data will
differ from test set values by the amount of static source error correction.
6.
The instructions in the following paragraphs are for
Fixed Wing
aircraft
only
.
a.
If Mach is configured to be displayed, adjust air data test set control pressures to 9,000 feet and
260.0 KIAS and observe indicator Mach number to be 0.46. Record results in Table 3-1, Test
Paragraph T2.
b.
To verify V
MO
operation, use the Air Data Test Set to provide airspeed greater than V
MO
. A red
V
MO
bar will extend from the V
MO
point to the high-speed end of the tape.
The digits change to red in the Air Speed Digital Readout window when the air speed is greater
than V
MO
. Record results in Table 3-1, Test Paragraph T3.
7.
The instructions in the following paragraphs are for
Rotor Wing
aircraft
only
.
a.
To verify V
NE
operation, use the Air Data Test Set to provide airspeed greater than V
NE
. A red
V
NE
bar will extend from the V
NE
Power On point to the high-speed end of the tape. Record
results in Table 3-1, Test Paragraph T4.
Reset the Air Data Test Set to provide airspeed lower than V
NE.
A yellow V
NE
bar will be drawn
from the V
NO
point to the V
NE
Power On point. Record results in Table 3-1, Test Paragraph T5.
Reset the airspeed setting on the Air Data Test Set so that a green bar is drawn between the V
NO
point the low end of the tape. Record results in Table 3-1, Test Paragraph T6.
The digits change to red in the Air Speed Digital Readout window when the air speed is greater
than or equal to V
NE
. The digits change to yellow when speed is greater than or equal to V
NO
but
less than V
NE
Power On.
8.
Using the air data test set, adjust the pressures to provide a descending vertical
velocity
between 1,000
and 3,000 feet per minute to ambient pressure. Observe that the indicator altitude tape moves
smoothly and properly displays altitude in the window.
9.
Adjust the air data test set pressures to provide a decreasing airspeed rate of change to observe the
airspeed tape operation. Observe that the indicator airspeed tape moves smoothly and properly
displays airspeed in the window.
10.
Release pitot and static pressure from the air data test set and disconnect pitot and static lines at the
aircraft. Observe that the indicator display has returned to field altitude at current barometric setting
with no airspeed indicated.
