As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL BURNING SMELL ON TAXI IN WHEN BLEEDS SWITCHED TO APU. AFT FA ALSO STRONGLY SMELLED IT. C/W ODI PREVENTION TASKS. C/W WORK CARD 0550-2001, 0550-6001 AND 0550-2002. NO SMOKE, ABNORMAL SMELLS OR FUMES NOTED. A/C OK FOR SERVICE. (LP# 8786312)