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A

747-400
MAINTENANCE MANUAL

IRS HEADING

ILS LOCALIZER

ILS GLIDESLOPE

RIGHT ADF
VORADF
Approach Mode Failure Flags
Figure 14A

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 (5)

(6)

(7)

(8)

(9)

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747-400 MAINTENANCE MANUAL
 (b)  
The selected runway course is displayed below the identifier/frequency field.

 (c)  
The distance received from a DME co-located with the tuned ILS

 is displayed below the selected course field.The source annunciation (ILS L,C,R) for the radio data is displayed at the upper, right between the heading readout and the identifier/frequency display.The lower corners contain the ADF/VOR radio navigation aid information.

 (a)  
The top line displays the EFIS control panel switch position annunciation. If the switch is in the OFF position, the entire area is blank.

 (b)  
The color coding is green for VOR and cyan for ADF.

 (c)  
The decoded station identifier received from the navigation radio is displayed below the switch position annunciation. If a valid identifier is not received, the identifier is replaced with the tuned frequency received from the radio.

 (d)  
For VORs with a co-located DME, if no identifier is received from the VOR, an identifier from the DME is substituted. The identifier source is distinguished by character size: medium for VOR and small for DME.

 (e)
The DME distance is displayed for VORs with a co-located DME.There are four TCAS inturder symbols (expanded mode only):

 (a)  
Resolution Advisory (red square with red fill),

 (b)  
Traffic Advisory (yellow circle with yellow fill),

 (c)  
Proximate Traffic (white diamond with white fill),

 (d)
No Threat (white diamond with no fill).Vertical Speed Arrow (expanded mode only): An arrow shown next to the TCAS intruder symbols. The arrow represents the vertical speed and direction needed to avoid a collision. The arrow is the same color as the applicable symbol.Altitude Data Display: The altitude of the intruder is shown with the TCAS intruder symbols. The altitude is shown as either relative altitude or absolute altitude. The relative altitude is the distance between the intruder and your airplane. The absolute altitude is the distance between the intruder and the ground. The type of altitude shown (relative or absolute) is determined by the TCAS computer. Dashes are shown if the intruder is at the same altitude as your airplane.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 (10) There are nine TCAS messages (expanded mode only): TRAFFIC (red), TRAFFIC (yellow), OFFSCALE (red), OFFSCALE (yellow), TFC (cyan), TCAS FAIL (yellow), TA ONLY (cyan), TCAS OFF (cyan), and TCAS TEST (cyan).
 D. VOR Mode (Fig. 15 and 16)
 (1)  
The VOR mode presents selected course and VOR course deviation. An expanded or full compass rose format may be selected.

 (a)  
The VOR mode displays airplane direction with a heading-up reference on both the expanded and the full compass rose formats. Present heading is displayed digitally in the readout box at the top, center of the display. The label "HDG" indicates that the display is heading-up.

 (b)  
The readout box value changes and the compass rose moves to continually indicate the airplane's current heading.

 (c)  
The heading display is normally referenced to magnetic north. Annunciation and control of the reference (magnetic or true) is controlled by the TRUE/NORM switch located on the EICAS control panel/FMC switch.
　
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