ICA
1500-SERIES-ICA-1
Revision A - 01/22/2009
Page
14
of
15
Instructions for
Continued Airworthiness
6.0 Functional
Test
6.1 DPS Functional Test
a)
Connect aircraft battery and turn on master switch.
b)
Remove pressure tube assembly and connect vacuum tester to DPS pressure port.
c)
Apply suction to test port and check that cockpit annunciator light comes on at 9 ins.
H
2
O, ±1 in. H
2
O.
d)
Replace DPS if out of limits.
e)
Remove test equipment and replace pressure tube assembly on DPS port.
f)
Lift guard and put
ALT AIR
switch in the
OPEN
position.
g)
Check that the alternate air bypass door actuates to full open position.
h)
Put
ALT AIR
switch to
CLOSED
position.
i)
Check that alternate air bypass door actuates to fully closed and is secure.
