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7. Limit pedal inputs to half throw.
A1-F18EA-NFM-000
Figure 12-1. Warning/Caution/Advisory Displays (Sheet 31 of 55)
V-12-33 ORIGINAL
FCES CAUTIONS
INDICATOR · CAUSE / REMARKS CORRECTIVE ACTION
AHRS
One or Two
Channel Failure
FCS
Five Xs will appear for
each failed channel
(CAS P, CAS R, CAS Y,
N ACC, and L ACC)
· FCCs have detected a failure of AHRS data
(rate or acceleration data).
Rate sensor failures will occur in all three sensor
axes simultaneously (Xs in CAS P, CAS R, and
CAS Y for the failed channel).
Acceleration sensor failures will occur in both
sensor axes simultaneously (Xs in both N ACC and
L ACC for the failed channel).
Loss of one or two AHRS channels will not affect
flying qualities.
Loss of redundancy in rate and acceleration information
to the FCCs is the primary concern for a
two channel failure. Although there is no degradation
in flying qualities, subsequent AHRS failures
could lead to controllability problems if the two
channel AHRS failure procedures are not followed.
It is possible that a third AHRS channel has
failed but is not detected. Flying qualities will be
degraded for this situation and will include poor
roll coordination for large lateral inputs, pitch coupling,
and sluggish pitch response. If flying qualities
are degraded, assume a four channel failure has occurred,
and refer to AHRS Four Channel Failure.
Aircraft 165660 and up (AHRS equipped
aircraft) -
When FCS/FCES procedures complete -
One channel AHRS failure -
6. Land as soon as practical.
Two channel AHRS failure -
6. Descend below 25,000 feet.
If degradation in flying qualities are
present -
7. Refer to AHRS Four Channel Failure.
If no degradation in flying qualities are
present -
7. Land as soon as practical.
A1-F18EA-NFM-000
Figure 12-1. Warning/Caution/Advisory Displays (Sheet 32 of 55)
V-12-34 ORIGINAL
FCES CAUTIONS
INDICATOR · CAUSE / REMARKS CORRECTIVE ACTION
AHRS
Four Channel Failure
PCAS
RCAS
YCAS
FCS
FCES
Caution Light
²Flight Controls,
Flight Controls²
· FCCs have detected a failure of AHRS data
(rate or acceleration data).
· Rate sensor failures will occur in all three sensor
axes simultaneously (Xs in CAS P, CAS R, and
CAS Y for the failed channel).
· If Xs appear in all channels, or two channels with
degraded flying qualities.
· Acceleration sensor failures will occur in both sensor
axes simultaneously (Xs in both N ACC and L
ACC for the failed channel).
It is possible to experience a three channel failure
with only two channels Xd out. Flying qualities will
be degraded for this situation (see remarks above).
A detected loss of a third AHRS channel will result
in all four AHRS channels being Xd out. Appearance
of three columns of Xs will not be displayed
because the FCCs cannot determine the
good channel.
Below 20,000 feet, flying qualities are best between
190-210 KCAS. Pitch and directional damping
will be very low and roll coordination will be
weak.
· With a four channel AHRS failure, the aircraft is
not controllable with the flaps in HALF or FULL.
At altitudes above 25,000 feet, loss of control will
occur below 0.92 Mach. For loss of AHRS above
25,000 feet, maintain airspeed above 0.92 Mach
while descending.
· Potential for lateral pilot induced oscillations
(PIO) exists when landing with a Y CAS failure.
Aircraft 165660 and up (AHRS equipped
aircraft) -
When FCS/FCES procedures complete -
6. FLAP switch - AUTO
7. If above 25,000 feet, maintain >0.92 Mach until
descent below 25,000 is accomplished.
8. Jettison unwanted stores, if required, to improve
flying qualities.
9. Execute a straight-in on-speed approach with
flaps in AUTO. Limit angle of bank to 20°.
10. If not positioned for landing by in-the-middle
to in-close, a wave off and go around should be
executed.
11. Make an arrested landing if available.
12. Avoid stabilator braking.
A1-F18EA-NFM-000
Figure 12-1. Warning/Caution/Advisory Displays (Sheet 33 of 55)
V-12-35 ORIGINAL
FCES CAUTIONS
INDICATOR · CAUSE / REMARKS CORRECTIVE ACTION
Ail Fail
FCS
FCES
Caution Light
²Flight Controls,
Flight Controls²
AILERON ACTUATOR FAILURE
· Aileron failures may be caused by an actuator
failure (mechanical or two channel failure) or by
　
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本文鏈接地址：NATOPS Flight Manual 飛行手冊 2(34)