What was found
DURING HEAVY MAINTENANCE, A CRACK INDICATION WAS FOUND IN HOLE B IN DOUBLE JOGGLE AREA, FR 16. CRACK DIRECTION IS 3 OCLOCK VIEWED FROM OUTSIDE. CONFIRMED CRACK INDICATION USING BOROSCOPE IAW NTM 51-90-00. PERFORMED A PERMANENT REPAIR OF FRAME 16 IAW SRM 53-11-12-300-012. FINAL DIAMETER OF HOLE BEFORE INSTALL BUSH IS 0.5250 IN (13.335 MM). REAMED TO 2ND OVER SIZED LEADER HOLE B. (0.281 IN) AND ASSOCIATED HOLE A (0.216 IN). THIS REPAIR IS CLASSIFIED CATEGORY B.