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TMCS -EICAS DISPLAY -OPERATION
Target EPR
The target thrust cursor shows in green when it shows the EPR limit calculated by the TMCF for the active thrust limit mode.
The target thrust cursor shows in magenta when the TMCF uses a target EPR that the FMCF calculates. The target thrust cursor shows in magenta during any of these conditions:
*
VNAV is engaged and the autothrottle mode is THR REF. This occurs when VNAV is engaged during climb.
*
VNAV is engaged and the autothrottle mode is THR. This occurs when VNAV is engaged during descent and anti-ice is on.
*
VNAV is engaged and the autothrottle is off. The pilots can manually set the thrust levers to agree with the target EPR that shows on EICAS.
Fault Messages
TMCS fault messages show on the EICAS display for these conditions:
*
AUTOTHROTTLE DISC, caution occurs when the TMCS detects an automatic or manual disengagement
*
AUTOTHROTTLE L and/or AUTOTHROTTLE R, advisory occurs when the TMCS detects an ASM or arm switch failure.
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TMCS -EICAS DISPLAY -OPERATION
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TMCS -AUTOTHROTTLE FLIGHT PROFILE
General
During normal flight operations, the flight crew uses the TMCF to perform several routine or normal operations and tasks. These operations or tasks relate to autothrottle modes.
The autothrottle (A/T) modes operate in these flight phases:
*
Takeoff (TO)
*
Climb (CLB)
*
Cruise (CRZ)
*
Descent (DES)
*
Approach (APP)
*
Go-around (GA).
Autothrottle functions that relate to flight phases are flare retard during autoland and autothrottle disconnect.
Autothrottle thrust mode annunciations relate to pitch mode annunciations on the PFD. Use the MCP to select these modes.
Takeoff
In TO, the autothrottle controls thrust to the takeoff thrust limit. The autothrottle mode annunciation on the PFD is thrust reference (THR REF). At 80 knots (KTS) air speed, the autothrottle mode annunciation on the PFD changes to HOLD.
Climb
These are the three autothrottle mode selections in climb:
EFFECTIVITY
BEJ ALL
*
Vertical navigation (VNAV)
*
Flight level change (FLCH)
*
Autothrottle (MCP) speed mode or thrust mode.
These are the autothrottle mode annunciations for these modes:
*
THR REF when VNAV engages
*
THR when FLCH engages
*
SPD or THR REF when autothrottle mode engages.
The autothrottle mode only (MCP) engages when VNAV, FLCH, and TO/GA are not active and the airplane is in the air.
Cruise
These are the two autothrottle modes in cruise:
*
VNAV
*
Autothrottle mode only.
These are the autothrottle mode annunciations in cruise:
*
SPD when VNAV engages
*
SPD, VNAV is not active.
Descent
These are the three autothrottle modes in descent:
* VNAV
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TMCS -AUTOTHROTTLE FLIGHT PROFILE
*
FLCH
*
Autothrottle mode only.
These are the autothrottle mode annunciations in descent:
*
IDLE, THR, or HOLD shows for VNAV
*
THR, or HOLD shows for FLCH
*
SPD.
Approach
SPD is normal mode in approach with glideslope active or in a manual approach.
Go-Around
A GA mode request causes the autothrottle mode to change to THR. A second GA request causes the autothrottle mode to change to THR REF. You push a TO/GA lever to request GA.
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