The ON BAT light illuminates and the EICAS memo message ADIRU ON BAT displays.
The ON BAT light illuminates and the ground crew call horn sounds.
The ON BAT light extiguishes when the BATTERY switch is turned off.
Nothing. The ADIRU switch is always left on when securing the airplane.
A position can be entered at anytime on the ground.
A position must be entered before the ADIRU can enter the navigation mode.
A position entry is optional when the ADIRU is in the automatic relign mode.
A position entry is not possible when the airplane is moving.
EICAS alert message NAV ADIRU INERTIAL
EICAS memo message ADIRU ALIGN MODE
CDU scratchpad message ADIRU ALIGN
CDU scratchpad message ENTER ADIRU POSITION
Every 15 hours
Every 24 hours
Whenever the total time in the navigation mode is expected to exceed 15 hours.
Whenever tha total time in the navigation mode is expected to exceed 24 hours.
Push the INTIT REF key and select the INDEX line select key (6L).
Push the ERASE Prompt line select key (6L) then push the INDEX line select key (6L).
Push the EXEC key then push the INDEX line select key (6L).
Wait until traveling more than 400 NM from the ORIGN or more than half way to the destination before selecting the DEP/ARR key again.
Static ports only
Air data modules, AOA sensors, and TAT probe
Air data modules only
AOA sensors and TAT probe only
Air data modules only
Static ports only
Air data modules, AOA sensors, and TAT probe
AOA sensors and TAT probe only
ADIRU
Air data modules
The master FMC
SAARU
LNAV
VNAV
MAP display
Both CDUs
When more than 21 NM off the active route and not on an offset.
When more than 2.5 NM off the active route and not on an offset.
When passing over the waypoint in HDG SEL.
When passing over the PROCEDURE HOLD waypoint on an approach.
Magenta
Cyan
Green
White
Magenta
Cyan
Green
White
The active altitude constraint is displayed on line 1 of the LEGS page.
The active altitude constraint is displayed in magenta.
The active altitude constraint is displayed on the ND map.
The Active altitude constraint can be displayed on the CLB, CRZ and DES pages.
10nm
20nm
40nm
80nm
The FMC uses fuel quantity system values in flight.
The FMC uses calculated fuel values for performance.
During fuel jettison, the FMC calculated values are independant of the fuel quantity system values.
The FMC updates calculated values with fuel quantity system values regularly in flight and informs the crew when the differences are significant.
Weather returns will still display.
Weather retrurns will not display correctly.
There is a problem with the radar antenna.
Weather returns will not display or weather returns will display, but will be unreliable.
Selecting the DES NOW prompt on the DES page.
Selecting a lower altitude in the MCP altitude window in response to the CDU scratchpad message RESET MCP ALTITUDE.
Selecting a lower altitude in the MCP altitude window and pushing the MCP altitude selector when less than 50NM from the T/D
The inertial reference position is updated using information from the air data modules.
The ADIRU sends magnetic variation data to the FMCs to convert true heading ti magenetic heading.
The ADIRU recieves the same data inputs as the SAARU but compares and validates the data independently.
If the ADIRU fails, The PFDs will blank.
FMC
SAARU
ADIRU
A dedicated pilot static system and air data modules.
ADIRU
An independant attitude source instead of the ISFD
SAARU
FMC
VNAV PTH remains displayed during a descent after airspeed intervention is selected.
VNAV continues to command a descent after the MCP altitude selection is set to atleast 300 feet above the current airplane altitude.
"On approach" logic requires the FMC be in the descent phase and the flaps out of UP.
A glide path angle must be included in the approach and displayed on the LEGS page.
CDU is selected on the instrument Source selector.
The FMC selector is in the L position with the left FMC failed.
The FMC selector is in the R position with the right FMC failed.
Both FMCs have failed
ACT RTE X, page 1
ACT RTE X, any page
ACT RTE X, page 2 and beyond
ACT RTE X LEGS, any page
Passing the T/D point in FLCH
Selecting the DES NOW prompt on the DES page.
Selecting a lower altitude in the MCP altitude window and pressing the MCP altitude selector when less than 50 NM from the T/D.
Selecting a lower altitude in the MCP altitude window and pressing the MCP altitude sector when more than 50 NM from the T/D.
At above 50 feet when within 5.5 NM laterally from the active route leg.
At or above 50 feet with an intercept heading to the active route leg.
Only at or above 50 Feet on the departure route active leg.
LNAV is already active during takeoff.