ESI-500
Pilot’s Guide2-12
Operation
Attitude Degraded Operation
Attitude Degraded operation occurs when the normal air data aiding
source is lost for three minutes, or if the Pitch or Roll value is greater
than 35° for three minutes. The unit is able to continue displaying
attitude information at a lesser performance. The pilot is alerted to this
degraded mode of operation by an amber “ATT DEGRADED” indication
on the display. Note - Heading performance is also degraded for units
using the MAG-500.
• During ight, if air data is not failed and the “ATT DEGRADED”
indication is displayed, cross check the attitude with another
source or outside reference. Return to straight and level ight until
the message clears for full performance.
• During ight, if air data is failed and the “ATT DEGRADED”
indication is displayed, cross check the attitude with another source
or outside reference.
Heading Degraded Operation
For installations with a MAG-500, the Heading Degraded operation
occurs if the Roll value is greater than 11.5° for three minutes, or if the
“ATT DEGRADED” indication is shown.
The unit is able to continue displaying heading information at a lesser
performance. The pilot is alerted to this degraded mode of operation
by an amber “HDG DEGRADED” indication on the display.
• During ight, if “HDG DEGRADED” indication is displayed, cross
check the heading with another source or outside reference. Return
to straight and level until the message clears for full performance.
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