ASA crew scheduling is sending pilots revised schedules via ACARS. Some of these schedules are illegal. If you acknowledge the message when you recieve it and then later discover that it is illegal scheduling will tell you too bad, that by acknowledging the message you accepted the schedule.
Print out the revised schedule first. Then review it carefully to make sure it is legal. Add up the block times to ensure that the total block indicated is correct, make sure the turn times are realistic, etc. Once you have ensured that it is a legal schedule acknowledge the message. If it is an illegal schedule DO NOT acknowledge the message and then deal with it when you are on the ground.
Print out the revised schedule first. Then review it carefully to make sure it is legal. Add up the block times to ensure that the total block indicated is correct, make sure the turn times are realistic, etc. Once you have ensured that it is a legal schedule acknowledge the message. If it is an illegal schedule DO NOT acknowledge the message and then deal with it when you are on the ground.