What was found
DURING AN M-CHECK IN ATL, CORROSION WAS FOUND IN THE LEFT AND RIGHT UPPER BEAVER TAILS, P/N 5923937-501/502. THE BEAVER TAILS WERE REMOVED TO ACCOMPLISH CORROSION REMOVAL. AFTER THE BEAVER TAIL REMOVAL, IT WAS NOTED THAT 11 FASTENER HOLES COMMON TO THE PYLON FRONT SPAR WERE ELONGATED ON EACH SIDE OF THE AIRCRAFT. REPAIR WAS ACCOMPLISHED PER EA 99-181347 ON HOLES NR 78, 79, 81, 82, 84, 85, 88, 90, 91, 92 AND 93 PER LOG PAGE 1644536.