As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER APU STARTED ON GROUND, APU AIR PRODUCED SMELL OF FUMES, FILLED THE CABIN, AND FA'S CALLED FLIGHT DECK TO REPORTT A SMELL IN THE CABIN. SWITCHED OFF APU BLEED FOR APROX. 1 MIN. FUMES DISSIPATED. C/W NO GO ODI PREVENTION PROGRAM A220 2172- SMOKE / FUMES IN THE CABIN. REF MD LOG #2453291. ISOLATED SOURCE TO APU BLEED AIR,. APU BLEED AIR VALVE DEFERRED ON LOG#9676599. (LP# 9676598)