What was found
OGG - FLT 258 - VIBRATION FELT INFLIGHT THROUGH WHOLE AIRPLANE BUT, MOSTLY THROUGH CONTROL YOKE. PITCH TRIM SEEMED TO CHANGE CONSTANTLY. STABILIZER TRIM SYSTEM WORKED FINE, MADE AIR TURNBACK. FOUND RT ELEVATOR BOOST CYLINDER AFT ROD-END NUT BACKED OFF. REPLACED EYE BOLT ASSEMBLY PER MM FOR PRECAUTION. LT ELEVATOR BOOST CYLINDER CONDITION AND SECURITY CHECK OKAY. ELEVATOR OPERATION CHECK OKAY. RT ELEVATOR ROD-END RETAINER TO BE REPLACED AFTER ACFT FERRIED TO HNL. (W)