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 TM 55-1510-218-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
AVIONICS FLIGHT CHECKS (CONT)
f. Record the distances from the
known ground checkpoints to
the corresponding waypoint
location provided by the flight
management system. Maxi-
mum permissible along-track
or cross-track error for each
checkpoint is 175 stature
miles in the RNAV ENR
mode. The maximum permis-
sible error at the missed ap
proach point for an RNAV
approach is 0.35 statute mile.
*3.
Autopilot flight check - Perform
as follows:
Observe that all channels operate positively and
smoothly with no oscillation of any flight control.
a. Trim aircraft for straight and
level flight.
b. Turn control - Place in center
(detent) position.
c. Engage switch - Set to ENG.
d. Check autopilot heading pre-
selection as follows:
(I) Autopilot heading selector
(on course deviation indi-
cator) - Set test heading.
(2) Heading select switch-
indicator (autopilot mode
selector panel) - Press on.
(3) Aircraft should automati-
cally turn and roll out on
preselected heading.
4-12
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