Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Communication Breakdown
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Flight Cancelled / Delayed; General Maintenance Action
Aircraft; Company Policy; Procedure
Ferry aircraft with airframe vibration written up.  Possible worn elevator hinges. Previous crew noted vibration occurred at 308 knots on climb through FL220 and 308 knots on climb through FL280.Dispatch filed us above FL220 with no speed restriction. We contacted them and had them change our plan to cruise at FL190 no faster than 250 kt. The flight progressed without incident within these aforementioned parameters. Company was contacted [and] connected me to [a] CA (Captain) who assisted me with my decision to accept this aircraft. I felt that I was in a realm outside the airworthiness of the aircraft. An EA (Engineering Authorization) suggested to me that the aircraft had been deemed not to be airworthy and data had been collected to confirm that it is safe to fly. My question was whether I was permitted to take such an aircraft as a non-test pilot. Apparently; I am.Advise all line pilots that they may be placed in this scenario as the fleet apparently declines due to wear on elevator hinges.
Captain reported encountering issues with a ferry permit.