What was found
EXTERNAL WALKAROUND INSPECTION {B737-06-3-0550} - FOUND 4 DISHED RIVET HEADS WITH SKIN BULGING BETWEEN RIVETS AT FUSELAGE EXTERIOR SKIN AT BS 365 TO 369, STR 26 LH. LOCKED FOR FERRY FLIGHT PERFORMED BOROSCOPE INSPECTION OF AFFECTED STRINGER (LH #26), IN AREA REFERENCED. CORROSION APPEARS TO BE LOCATED PRIMARILY ON THE OTBD SIDE OF THE STRINGER/SKIN CONTACT AREA. PICTURES UPLOADED TO R.V.I. WEBSITE. UNLOCKING FOR REPAIRS EVALUATED CORROSION ON STR 26L AT STA 365, FOUND TO BE 100% MATERIAL LOSS. REPAIRED STRINGER 26L IAW UAL ECRA 5330-07368.