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ExcessiveVerticalDeviation
Excessive glideslopedeviation is displayed.
(3)
ApproachStatus The flight mode annunciator area willindicate the following: W Selectable HGS mode(AIII,AII,orAI)displayed asawhite message W CapturedHGSMode(AIII,AII,orAI)displayed asagreen message W Loss ofHGSMode(AIII,AII,orAI)displayed asaredline throughthegreen message W HGSapproach warning(APCHWARN)and HGSfailure (HGSFAIL)displayed
as redflags. EICASwill echo HGSFAIL as astatus message (white) W FLARE(amber) message(mode IIIaonly)in theADI area.
C. Audio Callouts
Groundproximity warningsystemmode6audio callouts are providedforground
closure awareness. Callouts are asfollows:
W 500,approaching minimums, 100,minimums, andthen
W 50(ifDH was not50feet), 40,30,20,10.
D. Output to FDR
The HGStransmitsthefollowingdatato theflightdata recorder:
W HGSin use
W HGSfail message
W Approach warning.
E. Output to MDC
The HGStransmitsthefollowingdatato the maintenance diagnostic computer:
Flight Crew Operating Manual MASTER
CSP A-
013
FLIGHT INSTRUMENTS Vol. 1 12-
70-
19
Head-
Up Guidance System REV 56, Jan 31/03
W HGSunitfailures; combiner, controlpanel, overheadunit,drive electronics unit or computerunit(whenthey occur)
W Inputfailures;RA1andRA2,DME1, VHF1andVHF2, ADC1andADC2, IRS1 andIRS2, IAPSandTCAS(whenthey occur).
F. Approach Monitor for Category II Operations
The HGS monitors approachparameters duringCategoryIIoperations (500feetto100 feetAGL)asfollows:
W TrackingMonitor -
This function evaluatesthe airplane’s approach relative to localizer andglideslopedeviation.
G. Approach Monitor for Category III Operations
The HGS monitors approachparameters duringCategoryIIIoperations (from500feet AGL). Thefollowing are checked:
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