GH-3100
Installation & Operation Manual
Page 4-2
Maintenance
TP-559
March 30, 2017
Revision K
4.2.2.1 Leak Check
Perform system level leak check per aircraft manufacturer’s maintenance manual.
4.2.2.2 Altitude Accuracy Check
This procedure complies with CFR FAR Part 91.411, part 43, appendix E for systems configured without
SSEC data.
NOTE
Refer to Service Letter SL-186 to perform Altitude Accuracy Checks for
GH-3100 systems using SSEC data.
1.
Set the barometric pressure on the display to 29.92 in Hg.
2.
Set pitot pressure on the air data test set to the normal cruise speed of the aircraft.
3.
Adjust static pressure air data test set to each of the altitudes listed in CFR FAR Part 91.411, part 43,
appendix E up to the service ceiling of the aircraft.
•
Observe that the indicator altitude tape moves smoothly and properly displays altitude within
the listed tolerances.
4.2.2.3 Computed Airspeed Accuracy Check
1.
Set the barometric pressure on the display to 29.92 in Hg.
2.
Set static pressure to ambient atmospheric pressure.
3.
Adjust pitot pressure air data test set to each of the settings listed in Table 4-1.
•
Observe that the indicator Airspeed tape moves smoothly and properly displays airspeed up to
the V
NE
speed of the aircraft per the tolerances given in Table 4-1.
Table 4-1: Indicated Airspeed
AIRSPEED (knots)
TOLERANCE
+10
°
C TO +50
°
C
(
±
knots)
RESULTS
50
5.0
80
3.5
100
2.0
120
2.0
150
2.0
200
2.0
250
2.4
300
2.8
350
3.2
400
3.6
450
4.0
