As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNT RUBBER SMELL IN FLIGHT DECK AND CABIN. INSP COCKPIT NO-DEFECTS NOTED RAN BOTH PACKS ON APU BLD NO BURNING SMELL NOTED GROUND RAN BOTH ENGINES OPS 1&2 SYS AND BOTH PACKS. NO BURNT RUBBER SMELL NOTED A/C OK FOR SERVICE AT THIS TIME