As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1229, EWR-CUN. TRANSIENT ODOR EVENT DURING TAKEOFF, MODORATE NURNING SMELL THROUOUT CABIN. BEGAN TO DISIPATE DURING CLIMBOUT. ( THALES-AVANT IFE (ENTIRE SYSTEM) ); REACTIVATED AVANT IFE SYSTEM IAW AVANT AMMS 44-21-00. NO HAZARDOUS CONDITION NOTED. PERFORMED FUNCTIONAL CHECK OF AVANT SYS PER AVANT AMMS 44-21-00. MDDR CLRD. MX-4 UPD. PLAC RMVD. 8THR732B."