CWAFlyer From United States of America, joined Mar 2005, 669 posts, RR: 1
Reply 2, posted (9 years 1 month 3 days 23 hours ago) and read 1736 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.