As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING OVERNIGHT CHECK, IT WAS DETECTED PRESSURIZATION LEAK IN THE NETWORK AREA OF REAR SPAR VERTICAL PRESSURE STA 663 LBL35 AND RBL35 ON DRAIN VALVE HOUSING BOTH SIDES; MAINTENANCE PERSSONNEL ISSUED THE WO 5367805 TO PERFORM WORKS; THE VALVE HOUSING BOTH SIDES ON WING CENTER REAR VERTICAL PRESSURE DECK WEB WAS REMOVED, CLEANED AND REINSTALED I.A.W. EO-3557033, ALL CORRECT.