What was found
DURING FUEL LEAK TROUBLESHOOTING, TWO SMALL CRACKS WERE IDENTIFIED RADIATING OUT OF ONE RIVET HOLE ON LT WING LOWER EXTERIOR PLATING, JUST OUTBOARD OF NR 1 PYLON. CRACK LOCATION BETWEEN STRINGERS 60 AND 61. TOTAL CRACK LENGTH APPROXIMATELY ONE INCH. ACTION CLASSIFIED AS A MAJOR REPAIR, AND REQUIRES FAA APPROVAL. REPAIR IS ACCOMPLISHED IAW AAR OKLA REPAIR SKETCH. CRACK REPAIR TO LOWER WING SKIN BETWEEN STR 60 AND 61, OUTBOARD OF NR 1 PYLON. REV IR DATED 7-23-96. WHICH WAS FAA APPROVED ON FAA FORM 8110-3. BY DER SO-443. (M)