CM170407AMA
shown again, but the time will count backwards. At the end of the test, the Leak Test
Results Screen (FIG 11) will be displayed.
To end a leak test, press any of the
MEAS
,
CNTR
or
HALT
keys.
FIG 11 LEAK TEST RESULTS SCREEN
7.2.3 FULLY AUTOMATIC LEAK TESTS
Fully automatic leak tests are a powerful feature of the MPS49: they allow the Operator to
test complex pneumatic systems, at various altitude/airspeed values, taking advantage of
the Multiple Isolator function (chapter 10.9) where available, to achieve a detailed overview
of the pneumatic circuit.
A fully automatic leak test consists of the following steps:
1. reach pre-programmed altitude and airspeed values (or Ps and Pt/Qc values) and
optionally AoA;
2. wait some time for stabilization;
3. run a timed leak test, isolating each port if the Multiple Isolator function is installed;
4. list the ports that are leaking more than the pre-programmed tolerances.
NOTE
if the Multiple Isolator is not available, the leak test will collect information about
each line (Ps, Pt, AoA) as a whole.
During the automatic leak test, if the Multiple Isolator is installed, the lower-right corner of
the display lists all the ports in different colors:
•
Blue if the port was not yet tested;
•
Pink if the port is being tested;
•
Green if the port is found to be tight;
•
Red if the port is found to be leaking.
If any suitable profiles are available, the Leak Screen (paragraph 4.3.2) displays a yellow
button Auto. The Operator can touch that button to select the profile and start the test.
Please refer to SECTION 11 for more information about test profiles. In order to be eligible
for automatic leak testing, a profile must have the following characteristics:
•
the name must begin with “leak”;
•
the first step must request a leak test.
Example
This paragraph explains how to create a quick leak test at 5,000 feet and 150 knots.
D.Marchiori Copyright
29