56-101-01178 Revision K
Page | 46
11. AIRCRAFT TESTING
CAUTION
: Observe
all safety precautions detailed in the “AMM” Aircraft Maintenance Manual.
CAUTION
:
When using STATIC (Ps) static only, make sure that the differential pressure “Qc”
stays within the limits of the ASI “Airspeed Indicator”.
A. Preliminary Setup
1. Ensure the STATIC and PITOT Test Set Leak Test
– (
Test Set and hoses only
) has
been completed and that the 1811NG is “Safe at Ground” and Vented before connecting
the tester to the aircraft systems.
Note:
The ports on the Test Set and mating hoses are color-coded to help prevent the
accidental crossing of Pitot and Static hoses.
2. Using a Barfield Inc.
universal adapter or another manufacturer’s custom aircraft pitot
adapter, connect the PITOT (Pt) port hose (
red band
) to the aircraft pitot system as
referenced in the aircraft maintenance manual.
Using the Barfield Inc.
2423F Static Port adapter or another manufacturer’s custom
aircraft static adapter, connect the STATIC (Ps) port hose (blue band) to the aircraft static
system, as referenced in the aircraft maintenance manual.
Note:
Some aircraft have more than one static port associated with a given static
system. Make sure that other ports in the system being tested are sealed
before continuing.
3. It is recommended to have the 1811NG chassis grounded to the aircraft or UUT using the
Ground stud located in the upper-right corner of the panel as depicted in item 5 of Figure
11.
4. Set the aircraft altimeter baro setting to 29.92 inHg (
1013.25 mbar
).
5. View and select the appropriate Limits on the 1811NG for the Aircraft / Instruments to be
tested.
6. If necessary, (from the Main menu) select Display Setup to configure display for the
Aeronautical display parameters required.
7. If necessary, (from the Main menu) select Units to configure the display for the Units
required.
B. Leak Testing - Combined ALT & CAS (using traditional Leak Rate Timer)
1.
If the display indicates “Leak Measure”, select the CONTROL key to toggle the
1811NG into the CONTROL mode.
2. Select CAS touch zone, the keypad
screen will be displayed with the “CAS = kts”
parameter indicated in the user entry window.
3.
Enter the desired CAS “Airspeed” value (for example, 300) and press ENTER.
4. The Test Set and aircraft will begin moving towards the airspeed entered.
5. If a different ROC rate is required, select ROC touch zone, the keypad screen will be
displayed with the “ROC = ft” parameter indicated.
6.
Enter the desired ROC “Vertical Speed”.
7. Touch ALT zone. A keypad screen appears. Input the desired altitude value required
for the leak test altitude.
Touch “Enter”.