• Predictive Windshear Fail (PWS FAIL) Message: Notes:
  • When the Weather Radar Predictive Windshear fails the amber PWS FAIL shows in all modes except PLAN. Normal Weather Radar may still operate.
  
  
  PWS FAIL Message Possible Causes:

  Before replacing any component perform BITE if available. (WXR R/T bite check in FWD E&E.)

  
  

  1.WXR Receiver/Transmitter

  
  

  2.WXR Antenna

  
  

  3.Radio Altimeter

  
  

  4.ADIRU

  
  

  5.Air/Ground Issue

  
  

  6.Wiring

  
  
  PWS FAIL Message:

  

  
  

  

  
  Circuit Breakers:

  Weather Radar R/T: P6-1 = D13.

  
  

  R/A #1: P18-1 = B2.

  R/A#2: P6-1 = A16.

  
  

  ADIRU Left (AC): P18-1 = E7.

  ADIRU Left (DC): P18-1 = E5.

  ADIRU Left EXC: P18-2 = E8.

  ADIRU Right (AC): P6-1 = C14.

  ADIRU Right (DC): P6-1 = C17.

  ADIRU Right EXC: P6-1 = C15.

  
  
  Applicable deferrals MEL 34-15-05 Windshear Detection and Avoidance System (Predictive)
  

Training Only