• Miles To Go: Notes:

  The miles display only functions if the HSI selector switch is in the NAV position. The data is miles to your next waypoint and is generated by the FMC.

  
  HSI SW in NAV Position

  1.If the FMC data is not available both HSI displays will be affected and will display dashes. If only one of the HSI displays indicates dashes, the on-side DAA is the most likely cause. If the miles display is blank, the indicator is the likely problem.
  
  ADI INFORMATION:

  

  
  Circuit Breakers:

  FMCS CMPTR 1: P18-2 = E8.

  FMCS CMPTR 2: P6-1 = D16.

  F/O XFMR (ALT): P18-2 = B4.

  Capt cmps xfmr (ALT): P6-1 = B12.

  Instrument Transformer 2: P6-1 = A12.

  Instrument Transformer 1: P18-2 = A1.

  DAA FMC #1 DC: P18-2 = C5.

  DAA FMC #1 AC: P18-2 = D1.

  DAA FMC #2 DC: P6-1 = D13.

  DAA FMC #2 AC: P6-1 = D8.

  
  
  Notes:
  The Ground Speed and Miles light modules are line replacable. The Aircraft Maintenance Manual can now be used as a reference for replacement of the modules. Ref to AMM 34-28-71-4.
  
  Applicable deferrals 34-36=Flight Management Computer System.

Training Only