The Infrastructure Minister will face questions about the steam railway in this month's sitting of Tynwald.
Speaker of the House of Keys Juan Watterson wants to know how many of the scheduled journeys between Douglas and Port Erin were completed last year.
Mr Watterson is also seeking information about the cost of a season ticket for 2016's steam train services, and to know whether those who missed out on journeys last year will be compensated this year.
The steam railway's timetable had to be reduced for a period last year while just one working locomotive available.
Ray Harmer will give an update when Tynwald sits on Tuesday.
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