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FLIGHT MODE ANNUNCIATOR - AUTOTHROTTLE MODES


ALFA SPD
ATS is ALFA speed mode. Throttles controlled to maintain a safe margin above stall speed.

ATS OFF
VNAV mode selected, autothrottles off. Light flashes as reminder to engage autothrottes.

AUT LND
Autoland pre-flight ground test is in progress. Appears for approximately 50 seconds.

CLMP
ATS in clamp mode. Power is removed from ATS servo (throttles remain stationary).

CLMP FMS
(VNAV mode engaged.) Throttles controlled by FMS in early descent or cruise descent flight mode.

EPR CL
ATS in EPR LIM mode with CL thrust selected. Throttles controlled to maintain climb thrust.

EPR CR
ATS in EPR LIM mode with CR thrust selected. Throttles controlled to maintain cruise thrust limit.

EPR G/A
ATS in go around mode with G/A thrust selected. Throttles controlled to maintain EPR G/A thrust limit.

EPR MCT
ATS in EPR LIM mode with MCT thrust selected. Throttles controlled to maintain maximum continuous thrust.

EPR T/O
ATS in go around mode with G/A thrust selected. Throttles controlled to maintain EPR limit takeoff thrust.

EPR 23
ATS in EPR LIM mode with 23 selected on ASSUMED TEMP selector (assumed temperature selected will be displayed) and T/O FLX thrust selected. Throttles are being controlled maintain derated takeoff thrust.

FLAP LIM
ATS controlling throttles to prevent exceeding flap limit airspeed. Occurs automatically when a reference airspeed greater than flap design limit airspeed is selected.

FMS EPR
(VNAV mode engaged.) Throttles controlled by FMS to maintain EPR.

FMS IDL
(VNAV mode engaged.) Throttles controlled by FMS for idle setting.

FMS SPD
(VNAV mode engaged.) Throttles controlled by FMS to maintain target speed.

LOW LIM
Occurs automatically when ATS throttle command would require a throttle setting lower than the minimum authority limit.

MACH 784
ATS in MACH select mode. Throttles controlled to maintain .784 Mach as selected in SPD MACH readout.

MMO LIM
Indicates that ATS is automatically limited to not exceed maximum operating Mach number (MMO).

OVRD XXX
(VNAV mode engaged.) When FMS OVRD selected, throttles controlled to maintain speed in FGCP SPD MACH readout.

OVRD LIM
(VNAV mode engaged.) When FMS OVRD selected and speed above Vmax or below Vmin, throttles controlled to maintain limit speed indicated by speed bug.

PWR
Automatic power-up test in progress. (Occurs approximately 2 minutes after landing.)

RETD
ATS in retard mode. Throttles automatically retarded during flare maneuver.

SLAT LIM
ATS controlling throttles to prevent exceeding slat limit airspeed. Occurs automatically when a reference airspeed greater than slat design limit airspeed is selected.

SPD ATL/MACH ATL
ATS limit when operating in SPD SEL or MACH SEL Mode, as applicable. Automatically occurs when ATS throttle command would exceed EPR limit.

SPD 250
ATS speed in select mode. Throttles controlled to maintain 250 KIAS as selected in SPD Mach readout.

VMO LIM
Indicates that ATS is automatically limited to not exceed maximum operating airspeed (VMO).




























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