What was found
LEFT ELEVATOR TORQUE TUBE CORRODED OUT OF LIMITS. FOUND DURING COMPLETE PAINT PROCESS. REMOVED TORQUE TUBE, PN UNKNOWN, FROM LT ELEVATOR PN 6634200-9, SN 0000106 DUE TO LEVEL 2 CORROSION. INSTALLED NEW TORQUE TUBE PN 6634002-15 IAW SRM 51-40-03, 51-40-04, 51-40-05, 51-40-06, 55-20-01 & MM 20-32-00. THIS IS CONSIDERED A MAJOR REPAIR. SEE WO YMMHB SQUAWK 2 , 1 FOR ELEVATOR BALANCE.