In a message dated 8/11/2003 3:56:00 PM Pacific Daylight Time, damiross2@xxxxxxxxxxx writes: << Line Maintenance Baltimore, Chicago, Dallas, Houston, Las Vegas, Los Angeles, Oakland, Phoenix, Salt Lake City and Tampa Bay Intermediate (B&C Checks) Maintenance - Phoenix, Houston and Dallas Heavy Maintenance Dallas >> What exactly is line maintainance? It looks like they do line at their big focus cities (with the exception of BUR as that is close to LAX and too small a field to have a hangar at), intermediate at their biggest service city, and 2 home cities and heavy at the home base