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A1-F18EA-NFM-000
I-2-75 ORIGINAL
displays the RSET advisory for 10 seconds to indicate a successful reset. If the failure remains (a) the
failed actuator/component is not restored, (b) the FCS failure indications return, and (c) the RSET
advisory is displayed for 10 seconds to indicate an unsuccessful reset. In other words, the FCS
RESET button does not fix a detected failure; it merely allows components to be
restored and failure indications to be removed, if and only if the failure no longer exists.
Prior to takeoff (cycle to WoffW), a successful FCS RESET automatically clears all BLIN codes.
Inflight or post-flight, however, BLIN codes are not automatically cleared with a successful FCS
RESET in order to preserve this data for maintenance troubleshooting. Inflight and post-flight BLIN
codes can be cleared, if desired, by pushing the FCS RESET button simultaneously with the paddle
switch.
Additionally, the FCS RESET button is used in conjunction with the FCS BIT consent switch to
enter the FCS exerciser mode.
2.9.15.3 FCS Exerciser Mode. The FCS exerciser mode is incorporated to aid hydraulic system
warming during cold weather starts. The exerciser mode allows hydraulic fluid and hydraulic seals to
warm towards normal operating temperatures without making large surface movements. Large surface
movements with a cold hydraulic system can result in hydraulic seal damage, leaks, and loss of fluid.
On the ground, the FCS exerciser mode is initiated by simultaneously holding the FCS BIT consent
switch in the ON position while pressing the FCS RESET button. When initiated, the mode cycles the
stabilators, flaps, ailerons, and rudders through 20% of full travel for 10 cycles in 20 seconds. The
operation can be stopped prior to 20 seconds by pressing the paddle switch.
During cold weather starts, avoid activating any hydraulic actuated system for two minutes after
both engines are online. This allows hydraulic fluid to warm both systems and prevents hydraulic seal
damage and potential hydraulic leaks. If the aircraft has not flown within 4 hours with ambient
temperatures below -18°C (0°F), up to three selections of the FCS exerciser mode may be required in
order to obtain a successful FCS RESET (after the initial 2 minute warmup).
In standard or warm conditions, do not initiate the FCS exerciser mode
multiple times in an attempt to get a successful FCS RESET. In such
conditions, multiple initiations may excessively elevate hydraulic system
temperatures, increasing actuator and hydraulic pump seal wear and
potentially decreasing component life.
2.9.15.4 FCS BIT Consent Switch. The FCS BIT consent switch is located above the right console
beneath the right canopy sill. The switch is used in conjunction with the FCS BIT option or the FCS
RESET button to initiate FCS IBIT or the FCS exerciser mode, respectively. See the FCS Initiated
BIT (IBIT) section at the end of chapter 2 for details.
ON When held (for at least 2 seconds) during selection of the FCS option, initiates
FCS IBIT. When held during a press of the FCS RESET button, initiates FCS
exerciser mode.
OFF FCS IBIT and FCS exerciser mode not selected.
A1-F18EA-NFM-000
I-2-76 ORIGINAL
2.9.15.5 FCS Related Cautions. FCS related cautions shown in figure 2-25 are described in the
Warning/Caution/Advisory Displays in Part V.
Caution
Associated Cockpit Indications
Master
Caution
Light
Master
Caution
Tone
FCS
Caution
FCES
Light
²Flight Controls,
Flight Controls²
Voice Alert
AOA X Note 1 X X
Air Data X X
ATC Fail X X X
AUTO PILOT X X
P CAS X X X
R CAS X X X
Y CAS X X X
CHECK TRIM X X
CK FLAPS X X
FC AIR DAT X X X
FCS X X Note 2 X Note 2
FCS HOT X Note 3 Note 3
FLAPS OFF X X X
FLAP SCHED X X X
G-LIM 7.5G X X
G-LIM OVRD X X
HYD 5000 X X X
NWS X X X
R-LIM OFF X X
RIG X
S/W CONFIG X X
NOTES
1. AOA caution within 12 seconds of takeoff then replaced with the FCS caution if the AOA failure
has not cleared.
2. Also displayed when any aileron, stabilator, or rudder actuator failed off (Xd out and a ²bold
X² over the surface position on FCS Status Display).
3. The ²Flight Computer Hot, Flight Computer Hot² voice alert and FCS HOT light on the Caution
Lights Panel are activated when the FCS HOT caution is set.
Figure 2-25. FCS Related Cautions and Cockpit Indications
A1-F18EA-NFM-000
I-2-77 ORIGINAL
2.9.16 FCS Status Display. When an FCS failure has occurred, the FCS status display (figure 2-26)
can be used to determine the location and type of failure. The FCS status display is selected by the FCS
　
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