As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER START OF BOTH ENGINES FA NOTIFIED CREW OF BURNT RUBBER SMELL IN BACK OF CABIN THRU CENTER OF CABIN. SECURED BOTH PACKS AND COMPLIED WITH EQRH. SMELL DISCIPATED WITHIN 1 MIN OF PACKS OFF. PERFORMED T/S AND MTC PER AMDS W/C 0550-2002. PERFORMED LEVEL A DECONTAMINATION PER AMDS W/C 2100-2007. FOUND NO EVIDANCE OR CONTAMINATION. C/W NO GO ODI LOG PAGE # 1175281. (LP: 7299166)