What was found
AIRCRAFT INSPECTION FLOORBEAM BS 310, RBL 42, UPPER CHORD OF FLOORBEAM, FOUR EACH FASTENER COUNTERSINKS ARE TOO DEEP. LOCK FASTENER HEADS PULLING THROUGH UPPER SURFACE OF CHORD. FLOORBEAM UPPER T CHORD AT STATION 310 REMOVED IAW SRM 51-40-02 REV 113. NEW T CHORD FABRICATED IAW DWG 1415810 SHT 23 REV G & EA F-5310-T0311851 PT 1. ALTERNATE FINISHING FOR STATION 310 FLOORBEAM UPPER CHORD. FABRICATION & INSTALLED IAW DWG 141N5180 SHT 26 REV D & SRM 51-40-02 REV 113. REPAIR IS CLASSIFIED AS MAJOR.