A320 v/s indicator white
Thread Starter
Joined: Apr 2007
Posts: 118
Likes: 0
From: us
A320 v/s indicator white
hi,
yesterday the v/s indicator line which is normally green was white in colour before pushback.
however once we got airborne it turned to green.
any reasons for the change in colour?
did a search but to no avail.
thanx.
yesterday the v/s indicator line which is normally green was white in colour before pushback.
however once we got airborne it turned to green.
any reasons for the change in colour?
did a search but to no avail.
thanx.
Joined: Mar 2005
Posts: 731
Likes: 0
From: England
Should be green normally or amber with excessive V/S
Did the grey background shading disappear too until the needle turned green? If so it's possible the screen had either not warmed up fully or been starved of cooling for some reason and overheated temporarily.
Do you have the old CRT's or the newer LCD screens on your aircraft?
Did the grey background shading disappear too until the needle turned green? If so it's possible the screen had either not warmed up fully or been starved of cooling for some reason and overheated temporarily.
Do you have the old CRT's or the newer LCD screens on your aircraft?
Joined: Feb 2006
Posts: 22
Likes: 0
From: EU
Hi,
Just my 2 cents, I have seen this twice before, one of our friends at engineering said that it might be show up after the a/c had some sort of software update, ( nav data or EIS update i don't know)
Regards
Lamboo1
Just my 2 cents, I have seen this twice before, one of our friends at engineering said that it might be show up after the a/c had some sort of software update, ( nav data or EIS update i don't know)
Regards
Lamboo1
Joined: Dec 2002
Posts: 2,775
Likes: 353
From: UK
Not the same software package, but the Avro RJ has a similar feature.
IIRC the green-white changeover indicates a different source for the information than normal (green = normal), i.e. if air data invalid or unreliable (low speed, on grnd, etc) then the VS display uses inertial velocity (white = alternate).
If memory has failed me, an alternative may be that the air data source has been switched, i.e all on ADC 1 or all on ADC 2. This might also indicate that there would not be any comparator function available for that data.
IIRC the green-white changeover indicates a different source for the information than normal (green = normal), i.e. if air data invalid or unreliable (low speed, on grnd, etc) then the VS display uses inertial velocity (white = alternate).
If memory has failed me, an alternative may be that the air data source has been switched, i.e all on ADC 1 or all on ADC 2. This might also indicate that there would not be any comparator function available for that data.
