FLIGHT
INSTRUMENTS
AIRPLANE
OPERATIONS
MANUAL
2-17-20
Page
14
Code
01
REVISION 37
AOM-145/1114
ISIS ABNORMAL OPERATION
In case of abnormal operation or failure detection in one or several
ISIS functions, the following flags are displayed:
LABEL MEANING ACTION
ALT (white
digits inside a
red filled box)
Indicates loss of altitude
function. It is displayed
instead of the altitude
scale.
Report to
maintenance.
ATT (white
digits inside a
red filled box)
If during alignment phase,
indicates an ISIS failure to
align.
The system’s
electrical power must
be reset. Make sure
the airplane is
stationary during
subsequent ISIS
alignment.
If during any other phase of
operation, indicates loss of
attitude function.
Report to
maintenance.
ATT : CAGE
(black digits
inside an
yellow filled
box)
Indicates that ISIS has to
be caged. It is displayed in
the upper mid-section of
the screen.
Hold the airplane in
straight and level
flight and at constant
speed. Press the
CAGE Button for at
least 2 seconds until
the ATT 10s flag is
removed.
HDG (white
digits inside a
red filled box)
Indicates loss of magnetic
heading function. It is
displayed in place of the
heading scale.
Report to
maintenance.
Continued
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