As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ONGOING TOUBLESHOOTING OF THE #1 ENGINE RIGGING EVENTUALLY REQUIRED THE REPLACEMENT OF THE FUEL CONTROL UNIT. ACCELERATION PICKUP AND THE MOVEMENT OF THE INTERNAL RIGGING PROPERTIES WERE THE PRIMARY CONCERNS AND CONSULTATION WITH PRATT & WHITNEY ADVISED THIS REMEDIAL ACTION. THE FCU WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.