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to revert to degraded mode.
NOTE
FCS status display is shown for a
channel 1 right trailing edge flap
shutoff valve 2 failure but is typical
for any channel failure of trailing
edge flaps shutoff valves.
EFFECTS:
No change in flying qualities.
Actuator reduced to half hinge moment capability
if four channels of single shutoff valve fail.
Figure 15-20. FCS Failure Indications and
Effects
Figure 15-21. FCS Failure Indications and
Effects
A1-F18EA-NFM-000
V-15-29 CHANGE 1
NOTE
FCS status display is shown for a left
stabilator 4 channel failure example.
EFFECTS:
Autopilot inoperative.
Failed stabilator hydraulically driven to 2°
trailing edge up.
Automatic compensation for failed stabilator.
Flaps - AUTO:
Low roll rate in transonic region below 20,000
feet.
Significant roll and yaw coupling may occur
with forward stick inputs when above 1.4
Mach and 30,000 feet.
Reduction in nose down pitch authority above
10° AOA.
Flaps - HALF:
Nearly normal flying qualities.
Minor roll-yaw coupling with longitudinal
stick inputs.
Sudden, but controllable, yaw during rotation
on bolters or touch-and-go.
NOTE
FCS status display is shown for
channels 1 and 2 failure example.
EFFECTS:
FCS caution is not displayed.
No change in flying qualities.
Figure 15-22. FCS Failure Indications and
Effects
Figure 15-23. FCS Failure Indications and
Effects
A1-F18EA-NFM-000
V-15-30 CHANGE 1
NOTE
FCS status display is shown for
channels 1 and 4 failure example.
EFFECTS:
Flaps - AUTO:
Spoiler failed closed -
·Available nose-down pitching moment
reduced at high AOA.
·Slight uncommanded roll and yaw can
occur at high AOA when functional
spoiler opens.
EFFECTS:
Autopilot inoperative.
Reduced pitch stick authority.
Flaps - AUTO:
Increased stick force per g.
Flaps - HALF or FULL:
Increased stick force per AOA.
Figure 15-24. FCS Failure Indications and
Effects
Figure 15-25. FCS Failure Indications and
Effects
A1-F18EA-NFM-000
V-15-31 CHANGE 1
EFFECTS:
Autopilot inoperative.
Reduced roll stick authority.
NOTE
FCS status display is shown for right
trailing edge flap four channels
failure example.
EFFECTS:
Autopilot inoperative.
Trailing edge flaps hydraulically driven to 5°.
Flaps - AUTO:
Speedbrake function disabled.
Flaps - HALF or FULL:
Select FULL flaps for maximum aileron
droop.
Excessive approach speed (refer to FLAPS
OFF, this section).
Left trailing edge flaps may fail OFF due to
asymmetry.
Figure 15-26. FCS Failure Indications and
Effects
Figure 15-27. FCS Failure Indications and
Effects
A1-F18EA-NFM-000
V-15-32 CHANGE 1
NOTE
FCS status display is shown for
channels 1 and 2 failure example.
EFFECTS:
No change in flying qualities.
NOTE
FCS status display is shown for
channels 1 and 4 failure example.
EFFECTS:
Left rudder (channels 1 and 4) failed (flutter
damped) or right rudder (channels 2 and 3)
failed (flutter damped).
Directional control critical with one engine
inoperative.
Autopilot inoperative.
No rudder toe-in or flare.
Flaps - AUTO:
Speedbrake function disabled.
Figure 15-28. FCS Failure Indications and
Effects
Figure 15-29. FCS Failure Indications and
Effects
A1-F18EA-NFM-000
V-15-33 CHANGE 1
NOTE
FCS status display is shown for
channels 1 and 2 failure example.
EFFECTS:
No change in flying qualities.
NOTE
FCS status display is shown for
channels 1 and 4 failure example.
EFFECTS:
Left aileron (channels 1 and 4) failed (flutter
damped) or right aileron (channels 2 and 3)
failed (flutter damped).
Autopilot inoperative.
Flaps - AUTO:
Speedbrake function disabled.
No aileron droop.
Flaps - HALF or FULL:
No aileron droop.
Trailing edge flaps 30° or 40°.
Leading edge flaps and rudder toe-in schedule
normally.
Figure 15-30. FCS Failure Indications and
Effects
Figure 15-31. FCS Failure Indications and
Effects
A1-F18EA-NFM-000
V-15-34 CHANGE 1
NOTE
FCS status display is shown for
channels 1 and 4 failure example.
EFFECTS:
Failed leading edge flap frozen.
Autopilot inoperative.
Flaps - AUTO:
Speedbrake function disabled.
Good flap frozen, responds to differential
　
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