What was found
HIGH VIBE IN YOKE AND PEDALS STARTING AT 250KTS. INCREASED INTENSITY AS SPEED INCREASED. CHECKED ELEVATOR AFT CONTROL CABLE TENSIONS, TENSIONS WERE WITHIN LIMITS IAW MM 27-31-00. CHECKED RUDDER CABLE TENSIONS, ALL TENSIONS WERE WITHIN LIMIT IAW MM 27-20-00. CHECKED LT & RT AILERON WING TENSIONS, TENSIONS WERE NOT WITHIN LIMITS, IAW MM 27-10-00, COMPLIED WITH AILERON TRIM TAB FREE PLAY CHECK. FREE PLAY WITHIN LIMITS IAW MM 27-10-00. COMPLIED WITH ELEVATOR TRIM TAB FREE PLAY CHECK. FREE PLAY WITHIN LIMITS IAW MM 27-10-00. COMPLIED WITH RUDDER TRIM TAB FREE PLAY CHECK. FREE PLAY WITHIN LIMITS IAW MM 27-10-00. VERIFIED TRIM TAB FREE PLAY CHECKS. RETRACTED GEAR VERIFIED DOORS SIT FLUSH TO BOTTOM OF WING & HAVE PRELOAD IAW MM 32-10-00. ADJUSTED ELEVATOR CONTROL CABLES & ELEVATOR SERVO CABLES TENSIONS TO UPPER END OF TENSION CHART IAW MM 27-31-00 & 27-31-03. WHILE INSPECTING ELEVATOR FUSELAGE CABLES, FOUND ELEVATOR TRIM CABLES AFT OF THE TRIM MOTOR HAVE TENSIONS LOW. VERIFIED ELEVATOR CONTROL CABLES AND ELEVATOR SERVO CABLES TENSIONS.