Which term describes the time a crewmember is scheduled to check-in before a flight?

The term that describes the time a crewmember is scheduled to check-in before a flight is "Report Time." This is a critical part of a flight operation as it indicates when the crewmember must arrive at the airport and be ready to begin their duties, including any necessary pre-flight briefings, safety checks, and possibly completing documentation. Report Time ensures that crew members are adequately prepared and present well before takeoff, which is essential for maintaining schedules, safety, and effective communication among the team.

"Stand by" refers to a situation where crew members are ready to be called upon for duty, usually when there is a potential need for them to fill in due to an absence, but it does not specify a check-in time. "Rest Period" typically refers to the amount of time a crew member has to rest between duty periods, ensuring they are fit for their upcoming flights. "RON" stands for "Remain Overnight," which pertains to the crew's accommodation status rather than their check-in time. Each of these terms has its own specific context within aviation operations, but "Report Time" distinctly identifies the schedule for crew readiness prior to a flight.