• Ground Proximity Warning System (GPWS) INOP Light: Notes:
  • The amber GPWS INOP light comes on when the GPWS and/or GPWS Windshear is inoperative.
  
  
  
  
  GPWS INOP Light Possible Causes:

  Before replacing any component perform BITE if available. (Push the test switch once for level 1 test, twice for current faults.)

  
  

  1.Ground Proximity Warning Computer

  
  

  2.Wiring

  
  
  GWPS Fault Light:

  

  
  

  

  
  Circuit Breakers:

  GND PROX Warn: P18-1 = B7.

  Panel & INSTR 28v PRI F/O: P6-3 = B10.

  Master Dim SEC 6: P6-3 = F12.

  
  
  Applicable deferrals MEL 34-26 Ground Proximity Warning system

Training Only