• TAT Indicator Blank: Notes:

  If the TAT indicator is blank, and you have problems with other systems such as “A” channel Autopilot and/or Flt. Director, or Ground Prox, then replace #1 ADC. If the TAT indicator is blank and no problems with the other systems that receive digital info from ADC #1 then:

  
  

  1.Replace indicator.
  
  2.Check for power to the indicator.
  
  3.Check data bus wiring from #1 ADC to indicator.

  
  TAT INFORMATION:

  

  
  Circuit Breakers:

  TAT indicator: P18-2 = A7.

  Capt Air data Computer 26VAC: P18-2 = A9.

  Capt Air data Computer 115VAC: P18-2 = A8.

  F/O's Air data Computer 26VAC: P6-1 = B6.

  F/O's Air data Computer 115VAC: P6-1 = B7.

  TAT probe heater 115vac: P18-3 = C5.

  
  
  Applicable deferrals 34-5=Total Air Temperature Indication.

Training Only