• Localizer and Glideslope Fail Flags: Notes:
  • The amber LOC flag replaces the localizer deviation pointer and scale on the ADI, and Nav Data Display when the localizer receiver function has failed.
  
  
  • The amber G/S flag replaces the glideslope deviation pointer and scale on the ADI, and Nav Data Display when the glideslope receiver function has failed.
  
  
  • The ILS frequency is removed from the associated Nav Data Display when the LOC and/or G/S flags are in view.
  
  
  • The LOC and G/S flags will not display if a VOR frequency is tuned on the associated Nav Control Panel.
  
  
  • The Nav Data Display on the EFIS control panel must be set to APP for the LOC and G/S flags to display.
  
  
  LOC and/or G/S Flag Possible Causes:

  Before replacing any component perform BITE if available. (MMR bite check in main E&E.)

  
  

  1.MMR

  
  

  2.Wiring from the MMR to the DEU's.

  
  
  LOC and/or G/S Fail Flag:

  

  
  

  

  
  Circuit Breakers:

  MMR#1/ILS#1: P18-1 = A2.

  MMR#2/ILS#2: P6-1 = A13.

  
  

  Nav Control Panel #1: P18-1 = A3.

  Nav Control Panel #2: P6-1 = A15.

  Nav Sensor DC-1: P18-1 = B1.

  Nav Sensor DC-2: P6-1 = A10.

  
  

  AFCS SYS A FCC (DC): P18-1 = D2.

  AFCS SYS B FCC (DC): P6-2 = B3.

  AFCS MCP DC1: P18-1 = D5.

  AFCS MCP DC2: P6-2 = C3.

  AFCS SYS A Engaged INTLK: P18-1 = D3.

  AFCS SYS B Engaged INTLK: P6-2 = B4.

  AFCS SYS A SNSR EXC AC: P18-1 = C5.

  AFCS SYS B SNSR EXC AC: P6-2 = C2.

  AFCS SYS A Warning Light BAT: P18-1 = D1.

  AFCS SYS B Warning Light BAT: P6-2 = B1.

  
  

  ADIRU Right AC: P6-1 = C14.

  ADIRU Right EXC: P6-1 = C15.

  ADIRU Right DC: P6-1 = C17.

  ADIRU Left AC: P18-1 = E7.

  ADIRU Left EXC: P18-2 = E8.

  ADIRU Left DC: P18-1 = E5.

  INSTER XFER: P18-2 = A2 & E2.

  
  

  DEU#1 HOLD UP: P6-1 = D10.

  DEU#1 PRIMARY: P18-2 = D5.

  DEU#2 HOLD UP: P6-1 = D9.

  DEU#2 PRIMARY: P6-1 = D11.

  
  
  Applicable deferrals MEL 34-17 = VHF Navigation Systems (ILS)
  

Training Only