A maintenance provider can restore or assign and add a serial number to a part received with that information missing or illegible, and it can assign and add a serial number to a part not originally serialized, the FAA told ARSA.

The FAA’s clarification follows ARSA’s Dec. 11, 2012 request seeking to resolve confusion about part marking during maintenance. The Association asked the agency to acknowledge the permissibility of marking parts with serial number information.

The FAA recognized that such part marking is allowed. It also noted that marking of life limited parts requires coordination between the maintenance provider and the design approval or type certificate holder.

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