CWAFlyer From United States of America, joined Mar 2005, 690 posts, RR: 1
Reply 2, posted (10 years 2 weeks 1 hour ago) and read 1968 times:
Yes. Most try to. A lot of the spares are used for charters, especially
during the NFL season. There are times that due to maintainence,
damage, airworthiness directives, etc, the spares are not available.