What was found
HIGH AIR FRAME VIBRATION AT: ALT 17000, ALT 27000, SPD 330 KTS, SPP 310KTS. IAW AMM 27-34-00-200-001-A FUNCTIONAL CHK OF ELEV SERVO CONTROL BEARINGS FOR EXCESSIVE PLAY & CONDITION. IAW AMM 27-24-00-210-001-A VISUAL INSP OF RUDDER SERVO CONTROLS FOR HYD LEAKS & AMM 55-40-00-210-001-A SPECIAL DETAILED INSP OF RUDDER SIDE PANELS, AREA OF RUDDER BEARINGS, IN BOOSTER AREA & AROUND T/E FASTENERS & HOISTING POINTS, LT & RT. BEARINGS & HOISTING POINTS REMOVED & INSTALLED, BEARING 1 WITH PLAY PENDING, INSPECTED BEARINGS 2 - 7. IN ACCORDANCE WITH AMM TASK 27-21-41-000-001-A THE RUDDER REMOVED. IAW SRM 55-36-42-300-010 FITTING ASSY FORK END, BEARING 1 - 5 REPLACEMENT PERFORMED. ROTOTEST PERFORMED. IAW AMM 27-21-41-400-001-A, SUB TASK 27-2141-420-051-B, INSTALLATION OF RUDDER STEPS UNTIL D (11) 6 PERFORMED. IAW AMM 27-21-41-000-001-A RUDDER INSTALLED & TEST PERFORMED WITH SATISFACTORY RESULTS.