502 Type of Locomotive Maintenance Code

Value defining locomotive maintenance schedule.

String (AN)
Min 2 / Max 2
FCFRA Complete Maintenance (Originally Bi-annual)
FIFRI Intermediate (Originally Annual)
FPFRA Periodic (Usually Quarterly)
XXInspection/Maintenance scheduled by owner in addition to requirements. The second position can be any alphanumeric character mutually defined by the sending and receiving road. ("XX" recommended if receiving road does not need to distinguish between various types of local maintenance schedules.)

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