3 - 16 Operation
K0260 Issue No. 8
3.7.1 Testing the Aircraft Static System
CAUTIONS:
1O
BSERVE ALL SAFETY PRECAUTIONS DETAILED IN THE AIRCRAFT MAINTENANCE MANUAL.
2W
HEN USING PS (STATIC ONLY), MAKE SURE THAT THE DIFFERENTIAL PRESSURE (QC) STAYS WITHIN
THE LIMITS OF THE ASI.
1. Remove the static blanking cap and switch ON.
2. Connect the ADTS 505 to the Aircraft Static System.
Note: If the static system under test contains an ASI, applying static (vacuum) to this instrument
generates a Q
C
differential pressure.
3. Press ALT/Ps and make sure the display shows ALT Leak Measure.
Note: To monitor the rate of change press ROC/RATE Ps after pressing ALT/Ps. The control rate of
change for altitude can be changed within the selected limits.
4. If necessary, select [Units] in the Main Menu, press F1 [ft, kts, ft/min]. Press CLEAR/QUIT to go back
to the Main Menu.
5. If necessary change the limits in the Main Menu, press F6 [More], F1 [Limits]. After setting the limits,
press repeatedly CLEAR/QUIT to go back to the Main Menu.
6. Press LEAK MEASURE/CONTROL to select control mode and, using the numeric keys, set the control
aim. Press ENTER, the altitude changes to the control aim the rate of change slows as it gets near
the control aim and does not "overshoot" the aim value.
7. Enter another aim or use the nudge facility to change the aim value. At the end of testing, press
GROUND to return to atmospheric pressure.
8. On completion of testing, select GROUND and wait for the `Safe at Ground' message to be displayed,
see 3.7.8., refit the static blanking cap.
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