Some other discussions have touched on this before and if this has been answered please post the chat link but…
I was flying on UA1160 from ORD to PHL on 2/15/06 and while listening to chanel 9 the pilot requested final alt. of 33000 after center assigned 37000…33000 was granted and announced in the cabin. The tracking system reported our alt of 37000 for a majority of the flight rather then 33000…does the system pick up info on the flight plan or was this just a anomaly.
On a different note…great site and thanks to all the folks who dedicate their time and energy to keeping it running. Thanks!