What was found
FORWARD CARGO PIT DOOR SURROUND STRUCTURE LOWER SILL WEB HAS CORROSION ON UPPER SURFACE STA 440+5 TO 480+7 RBL28 WL157 / REMOVED CORROSION AT FORWARD CARGO PIT DOOR SURROUND STRUCTURE LOWER SILL WEB ON UPPER SURFACE STA 440+5 TO 480+7 RBL 28 WL157 I/A/W SRM 51-10-02-00-0; VERIFIED LIMITS ORIG 'T' .045 REMAINING .028 LOSS .017 FOUND TO BE OUT OF LIMITS I/A/W SRM 53-30-1A-1 REMOVED AND INSTALLED NEW LOWER SILL WEB I/A/W SRM 51-40-02-0G-0 AND BOEING DWG 143A8330 REV:A AAR TOOL A9A71 DUE 04/03/20 P/N 143A8122-10