What was found
OUTBOUND CREW ARRIVED AT AIRCRAFT 2130 LOCAL-STRONG ELECT BURNING ODOR THROUGHOUT CABIN & COCKPIT-OPENED COCKPIT WINDOWS- NO RELIEF. SMELL CHANGED FROM MODERATE TO STRONG 30 MINUTES LATER. MAINTENANCE ACCOMPLISHED B757 TROUBLESHOOT CABIN AIR QUALITY PER J/C 19L00021001. FOUND RIGHT CABIN AIR RECIRCULATION FAN INOPERATIVE. REMOVED AND REPLACED RIGHT CABIN AIR RECIRCULATION FAN, LEAK AND OPERATIONAL CHECK IS OKAY. UNIT VISUALLY INSPECTED AND FOUND THAT IMPELLER SEIZED AND STUCK. DISASSEMBLED STATOR, BEARINGS, HOUSING IMPELLER, HOUSING ASSY. STATOR, ROTOR ARE WORN AND DAMAGED. REPAIRED, TESTED, AND INSPECTED UNIT.