What was found
DURING HEAVY CHECK, FOUND TANK VENT PLUMBING CLAMP DETERIOTION AT PANEL 621BB. MAINTENANCE R & R TANK VENT TUBING, RT FUEL TANK PN 170-0612-401, 170-08813-403, 170-06108-403 IAW AMM 20-10-3, NRCC VP-036176-2013/520 C1-C2 FOR WORK ACCOMPLISHED, VP-036176-2013/648 FOR REFUEL AND DEFUEL, PN 170-06107-400 TUBE ASSY. ACFT REMAINS UNTIL HEAVY CHECK IS COMPLETED.