Originally Posted by
wiggy
Good point...
Must admit being a bit perplexed by the "negative" cabin alt figures - any ERJ operators able to shed any light on the cabin alt scheduling?
FL200 should give 6.7psid cabin alt 2800'.
However on short legs at light weights it could be different due to early change to cruise mode.
It will also depend on the cruise alt put into the FMS as this sets the initial cabin rate of climb.
Going the whole way with -200 to 300' looks like return to base mode to me which could be caused by a short descent before reaching 5000' AGL or 10000' absolute.
Something fishy.