What was found
DURING SCHEDULED INSPECTION AT AERO CORP IN LAKE CITY, FL, FOUND LEFT WING RIB 546.5 LOWER CHORD HAS A CRACK AT 4TH STRINGER FROM FORWARD END. STOP DRILLED CRACK. FABRICATED DOUBLER REPAIR OT OF 7075-0 BY .080 APPROXIMATE DIA 2.5 INCH BY 7.25 INCH LONG. INSTALLED DOUBLER IAW SB 57-0127 AND SRM 57-10-5. ALL OTHER MAINTENANCE PERFORMED IAW SRM 51-10-1, 51-10-3, 51-30-2, 51-20-2, AND 57-10-3. (M)