What was found
FLOATS AND FUEL CELLS, NEWLY MFG INBD L/E TANK , REPLACES OEM CELL PN 60-921057-3. NEWLY INSTALLED 1-6-12. LOW POINT DRAIN NIPPLE INTERNAL REINFORCEMENT DEBONDED, ALLOWING COMPLETE DRAINING OF LT WING FUEL LOAD. ACFT WAS ON GROUND AT TIME OF INCIDENT. RECOMMEND MFG PROCESS BE REVIEWED.