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ESI-1000
Pilot’s Guide
3-11
Operating Instructions
ERRORS AND INVALIDITIES (Continued)
Alignment Invalidity
(Refer to Figure 3-16)
Units with 1.1 software only.
D
uring alignment the “Align Hold” message replaces the attitude information,
if the pitch or roll angle of the
unit is out of tolerance. While
the message is active the
heading readout is removed
and the heading tape is filled
with a red X. Positioning
the unit to the proper pitch
and roll angles will cause
the “Aligning” message to
return.
Figure 3-16: Align Hold
Heading Data Loss
(Refer to Figure 3-15)
Units with 1.0 and 2.0 software used on a Part 23 aircraft only.
If heading data becomes invalid during operation the heading tape is filled
with a red X and the heading
digital readout is removed.
If data becomes valid
the display elements
automatically reset to
normal operation. A re-
alignment is recommended
If invalidity continues to be
observed refer to Chapter
4 Troubleshooting.
Figure 3-15: Heading Loss
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