Yes, Olivier,
we discussed this at length some time ago. The options are:
- if the negative relief valve opened, it is irrelevant what the cabin pressure control was doing.
- if it did not open, then please come up with a mode of the CPC that would command the cabin to climb or descend at a rate greater than 1800 fpm. I believe that to be so improbable that it does not merit discussion on this thread.
PS:: In the earlier discussion you mentioned that the ATA code of the message points to the CPC. I believe the reason for that to be that the cabin pressure sensor is located in the CPC.
Last edited by Jetdriver; 11th April 2011 at 16:15.