This rulemaking would improve the accuracy of the on-time performance reporting by carriers with respect to cancelled flights. Specifically, this rulemaking would revise the rule to discount all technical cancellations of code-share flights as reported by a marketing carrier when a flight was scheduled to be operated by a code-share partner of the reporting carrier but was actually operated by another code-share partner. This change would ensure that a marketing carrier does not have to report a "cancelled flight" to the Department in situations when a flight number, operating carrier, or aircraft changes, but the flight still operates according to its published schedule.