What was found
FOLLOWING DAMAGE WAS FOUND WHILE LT IB SLAT (PN F50B133B8, SN 133000 WAS AT THIS FACILITY FOR REPAIR. MILLED FITTING, (PN F50B133014) IS ATTACH POINT FOR NR 4 (OB) RAIL. SIX FASTENERS WERE IMPROPERLY INSTALLED THROUGH INNER SKIN OF SLAT. FOUR BLIND FASTENERS WERE LOCATED THROUGH INNER SKIN INTO EDGE OF MILLED FITTING. ONE SOLID FASTENER WAS THROUGH INNER SKIN AND FLUSHED ON OUTER SKIN, THIS WAS ALSO DRILLED THROUGH EDGE OF MILLED FITTING. , WHICH CAUSED OUTER SKIN TO BE DISTORTED. ONE SOLID FASTENER WAS COUNTERSUNK ON OUTER SKIN THROUGH THE INNER SKIN. MISDRILLED FASTENERS WERE FOUND DURING PRELIMINARY INSPECTION. DAMAGE TO THE MILLED FITTING WAS FOUND DURING THE TEAR DOWN PHASE OF REPAIR WORK.