What was found
WASTE DISPOSAL (TOILET): AFTER THE RT. ENGINE WAS STARTED A VERY STRONG ELECTRICAL BURNING ODOR WAS DETECTED IN THE AFT LAV AND ALSO THE AFT BAGGAGE COMPARTMENT. EVEN AFTER THE ENGINE WAS SHUTDOWN THE ODOR GOT MORE INTENSE. RAN APU FOR SEVERAL HOURS WHILE OPERATING THE FOLLOWING SYSTEMS, HYD PUMPS, ALL INTERIOR LIGHTING, MONITORS, DRAIN HEATERS, POTABLE WATER SYSTEM, AC OUTLETS, AND GALLEY APPLIANCES. NO ABNORMAL SMELLS NOTED. RAN BOTH ENGINES FOR ABOUT AN HOUR SELECTING PACKS ON/OFF. BLEED SOURCES ON/OFF. NO ABNORMAL SMELLS NOTED AT THIS TIME. ALL OPS CHECKED GOOD AT THIS TIME. REF GLOBAL 5500 SDS MANUAL 24-00-00