As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE: C, DURING PERFORMING BS 1000 RT BATH TUB FITTING REPLACEMENT AS PER EO NR B747-5310-18579A, IT WAS FOUND 3 EA OF FASTENER HOLES SEAM AT I/B VERT FLANGE AND 6 EA OF FASTENER HOLES FOUND OVERSIZED DIAMETER .309 INCH IN O/B HORIZ FLANGE. THE BATH TUB FITTING REPAIRED AS PER RS NR R53-23-25077 AND AS PER EO B747-5310-17015-C FOR FURTHER INSPECTION.