56-101-01178 Revision K
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Note:
Both ATP Leak Test Profiles can be altered by the user. Once they have been
altered, they can be saved. However, a different profile name will be required.
Note:
•
“Test Set-only” implies that no aircraft or instrument(s) are connected.
•
“Test Set with hoses” implies the Test Set has the hoses attached and capped
off so the test result represents the base line leak rate for all components
except the aircraft or instruments about to be tested.
•
It is highly recommended to complete at least the “Test Set with Hoses” leak
test before proceeding to the aircraft or instrument.
B. STATIC and PITOT Test Set Leak Test
– (Test Set and hoses only)
•
Confirm hoses connected to both Ps and Pt ports on the 1811NG.
•
Confirm the other end of each hose is sealed with an AN4 plug.
•
Determine the method of Leak Test. For method 1(Leak Rate Timer), follow B-1 steps
and for method 2 (ATP Leak Test), follow B-2 steps.
1.
Method 1: Leak Rate Timer
Figure 51
Leak Test Timer Screen
a) Select
“Control” mode. Wait Resuming Control screen appears for a few seconds.
b) Select ALT Target. ALT keypad display appears. Enter desired altitude to perform the
leak test.
c)
After establishing the Target altitude, select “Leak Measure” mode.
d) From the Main Menu, select Leak Testing and touch Leak Rate Timer.
e) Review Wait Time and Leak Time.
f) To start the timer, touch the Start Leak Test icon. The Wait timer starts counting down until
it reaches “0”. The word “completed” appears under the elapsed time. At this point, the
Leak timer starts counting down until it reaches “0”. The display area turns yellow and the
words “Leak Test Completed Select OK to view results” are displayed.
g)
Touch the “OK” button and the display shows the ALT Leak rate and the CAS Leak rate.
h) Record or note the ALT Leak rate and CAS Leak rate.
i)
Touch “Cancel” to return to previous screen. Touch “Exit” and “Exit” (twice) to return to