alexban thanks very much
also who can explain why :
Automatic Pressurization Control – Landing Airport Elevation
Above 6000 Feet[Option - High Altitude Landing switch]
If flight is less than one hour and landing altitude is less than 9500 feet:
Use Normal Procedures.
If flight is more than one hour or landing altitude is more than 9500
feet:
Use Normal Procedures except as modified below.
Prior to takeoff:
LAND ALT indicator ..................................................... 6000 feet
At initial descent or approximately 20 minutes prior to landing:
LAND ALT indicator ..........................Destination field elevation................................................... ...
why the diff btw flight less that one hr and flight more than one hr ??
