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3. Refer to G-LIM 7.5G and NO RATS procedures.
4. Land as soon as practical.
MC 2 · Mission computer 2 failed. 1. MC switch - CYCLE to 2 OFF then NORM
MC CONFIG · OFP loaded into either MC is incorrect. 1. Do not takeoff.
MU LOAD · AMU/mission card problem. Caution is disabled
in flight.
1. Verify mission card installed in proper AMU
slot and AMU door is closed.
2. If accompanied by a MNTCD or MSNCD advisory,
refer to MNTCD or MSNCD advisory.
3. If indication(s) does not clear, consider mission
implications of not having maintenance or mission
card. No restrictions to flight.
NAV FAIL · Indicates functional failures of the INS, GPS,
and air data functions.
GROUND
1. INS knob - OFF then realign (GND, CV, or
IFA)
INFLIGHT
1. ATT switch - STBY
2. Use standby instruments for altitude/airspeed/
vertical velocity.
3. Position keeping source - TACAN
4. Attempt an inflight alignment. (INS knob -
IFA)
NAV HVEL
GPS operating and POS/AINS selected -
· Aided INS and air data function horizontal velocities
disagree.
GPS operating and POS/INS selected -
· INS, GPS, or air data function horizontal velocities
disagree.
GPS failed or inop -
· INS and air data function horizontal velocities
disagree. May be caused by high wind velocities.
1. Cross check velocity vector.
2. Cross check horizontal velocities on HSI/
DATA/NAVCK sublevel.
NAV VVEL
GPS operating -
· INS and GPS vertical velocities disagree.
GPS failed or inop -
· INS and air data function vertical velocities disagree.
1. Cross check HUD velocity vector, HUD digital
vertical velocity, and standby rate-of-climb indicator.
NFLR OVRHT · NAVFLIR overheat detected. 1. LST/NFLR switch - OFF (if practical)
A1-F18EA-NFM-000
Figure 12-1. Warning/Caution/Advisory Displays (Sheet 23 of 55)
V-12-25 ORIGINAL
DDI Cautions and Caution Lights
INDICATOR · CAUSE / REMARKS CORRECTIVE ACTION
NO RATS
· Reduced Authority Thrust System (RATS) not
available.
One of the following input parameters missing/
invalid: longitudinal acceleration, WonW, wheel
speed, hook down position, THA. When single engine,
RATS is not available, and the NO RATS
caution should be expected. Caution is displayed
when the INS knob is OFF.
Carrier based -
1. Cycle gear and hook (if practical).
If caution remains -
2. Advise carrier of NO RATS condition.
Ship should increase wind-over-deck (WOD).
If required WOD not available -
3. Reduce gross weight to permit recovery with
available WOD.
If shipboard recovery not possible -
4. Divert
5. Execute shore based procedure.
Shore based -
1. MSP codes - CHECK for 851
If set -
2. ANTI SKID switch - OFF
OBOGS DEGD
· Oxygen concentration is below acceptable limits.
· Disconnected oxygen hose.
· Removing oxygen mask without placing the OXY
FLOW knob to OFF.
Good flow does not equate to good oxygen concentration.
An OBOGS DEGD caution indicates that
the oxygen concentration is inadequate, and hypoxia
may result.
GROUND
1. Verify proper mask and hose integrity.
2. Verify OBOGS monitor pneumatic BIT plunger
is unlocked and fully extended.
INFLIGHT
1. Verify proper mask and hose integrity.
2. Verify OBOGS monitor pneumatic BIT plunger
is unlocked and fully extended.
If caution remains and cabin altitude above
10,000 feet -
3. Emergency Oxygen Green Ring - PULL
4. OXY FLOW knob - OFF
5. OBOGS control switch - OFF
6. Descend below 10,000 feet cabin altitude.
7. Consider removing mask and resetting emergency
oxygen once below 10,000 feet.
OCS
· MC or SMS overlay halted due to run time.
Stores that require overlay may not be available.
1. Attempt to reload overlay.
A1-F18EA-NFM-000
Figure 12-1. Warning/Caution/Advisory Displays (Sheet 24 of 55)
V-12-26 ORIGINAL
DDI Cautions and Caution Lights
INDICATOR · CAUSE / REMARKS CORRECTIVE ACTION
L OIL HOT
R OIL HOT
· Designated ENG OIL TEMP high (149°C or
above)
· Designated AMAD OIL TEMP high (88°C or
above).
May be caused by an engine malfunction, hot fuel
at low fuel states, an over-serviced AMAD, AMAD/
fuel heat exchanger failure, fuel recirculation system
failure, or motive flow system failure, or with a
normally operating system during extended ground
operations with OAT greater than 103°F.
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NATOPS Flight Manual 飞行手册 2(29)
