What was found
DURING HEAVY CHECK, LT WING STUBB FITTING AT SPAR 3 , RIVET REPLACEMENT HOLE HAS CRACK LIKE INDICATION. MAINTENANCE UP SIZED HOLE SIZED PLUGS, INSTALLED IAW ETD 2015-170-028607, REV A, SEE CONTINUATION CARDS C1-C4 FOR WORK DETAILS. ACFT REMAINS UNTIL HEAY CHECK IS COMPLETED..