What was found
DURING C CHECK, AFT AIRSTAIR TORQUE BOX VERTICAL WEB HAS A CRACK COMING FROM LIGHTNING HOLE AT STA. 1323 LT SIDE. STOP DRILLED CRACK IAW B-727 SRM 51-10-1. 2) NDT STOP DRILLED HOLE IAW B-727 N.D.T. PT-6 51-00-00 FIG. 23, CRACK STOPS AT HOLE. FABRICATED REPAIR DOUBLER FROM 7075-T6 .040 INCH, ( 3 INCHES X 1.6250 INCH ) , P.O. NR 9912620 I.A.W. B-727 SRM 53-10-2 FIG. 6 AND SRM 51-40-2 FIG. 1. TREATED AND PRIMED REPAIR DOUBLER AND WORKING AREA IAW B-727 SRM 51-10-2. INSTALLED REPAIR DOUBLER AT LT AIR STAIRS STA. 1323 I.A.W. B-727 SRM 51-30-2.