I've noticed the GPWS test can only be initiated from the FO's G/S switch, and even then, there is no sound and the test is incomplete - the G/S light merely illuminates red and stays illuminated for as long as the switch is pressed.

Pressing the captain's G/S switch does nothing.

 

I think this was fixed in 1.0.2, could you check again please?

1 hour ago, Nico - Gumby said:

I think this was fixed in 1.0.2, could you check again please?

Just checked and it appears functional! It does differ from what the manual I have says should happen at each stage of the GPWS test, are there different software/hardware configurations that could change the behavior of the GPWS test? My manual is from 2009 if that helps.

That I don't know I'm afraid. Are the differences rather major or just minor?

It seems as though there are two GPWS tests that can be performed by flight crews - one test comes after a momentary press of the GPWS G/S switch and should generate the following warning sequence:

• GPWS FAULT Light illuminates
• G/S Lights illuminate
• "GLIDESLOPE" aural warning
• G/S Lights extinguish
• GPWS Lights illuminate
• "WHOOP WHOOP, PULL UP" aural warning
• "TERRAIN TERRAIN, WHOOP WHOOP, PULL UP" aural warning
• GPWS Lights extinguish
• GPWS FAULT Light extinguishes

 

Then if you hold the G/S switch for more than 5 seconds, it does a more comprehensive test and should generate the following sequence:

• GPWS FAULT Light illuminates
• G/S LIGHT illuminates
• Aural warnings in order:
  • "SINK RATE"
  • "WHOOP WHOOP, PULL UP"
  • "TERRAIN"
  • "WHOOP WHOOP, PULL UP"
  • "DON'T SINK"
  • "DON'T SINK"
  • "TOO LOW-TERRAIN"
  • "TOO LOW-GEAR"
  • "TOO LOW-FLAPS"
  • "TOO LOW-TERRAIN"
  • "GLIDESLOPE"
  • "BANK ANGLE"
  • "BANK ANGLE"
  • "MINIMUMS"
  • "MINIMUMS"
  • "TOO LOW TERRAIN"
  • "CAUTION TERRAIN"
  • "CAUTION TERRAIN"
  • "TERRAIN TERRAIN, WHOOP WHOOP, PULL UP"
  • "CAUTION OBSTACLE"
  • "CAUTION OBSTACLE"
  • "OBSTACLE"
  • "OBSTACLE"
  • "WHOOP WHOOP, PULL UP"
• G/S Light extinguishes
• GPWS Light illuminates
• GPWS Light extinguishes
• GPWS FAULT Light extinguishes

 

As of now in the sim, a momentary press generates:

• G/S Light illuminates
• G/S Light extinguishes
• GPWS Light illuminates
• GPWS Light extinguishes
• "DON'T SINK" aural warning x3
• "GLIDESLOPE" aural warning x2
• "OBSTACLE AHEAD" aural warning x3
• "PULL UP" aural warning x2
• "SINK RATE" aural warning x2
• "OBSTACLE AHEAD" aural warning x3
• "TOO LOW FLAPS" aural warning x2
• "TOO LOW GEAR" aural warning x2
• "TOO LOW TERRAIN" aural warning x3
• "TERRAIN" aural warning x3

 

A long press in the sim generates:

• G/S Light illuminates
• "GLIDE SLOPE" aural warning x3
• G/S Light extinguishes
• GPWS Light illuminates
• "PULL UP" aural warning x2
• GPWS Light extinguishes

 

Again I'm not sure if there's a software difference at play here or what. Appreciate you taking the time to look at this!

Here's an except from a manual from 1997 detailing a different GPWS test procedure:

 

So it appears there are at least some variations in the GPWS system

 

Thanks for that, will take a look here and see if we can add that one 🙂