As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE/SMELL - FLIGHT 4961 ENROUTE, THE PILOTS REPORTED THAT THE LT PACK EMITTED A BURNING ODOR WHICH SET OFF THE SMOKE ALARM. MAINTENANCE PLACED THE ISSUE ON MEL 21-50-2 CATEGORY C. MAINTENANCE TROUBLESHOT THE LT PACK SYSTEM AND OPERATIONAL CHECKS WERE GOOD IAW MM 21-00. NO FAULTS FOUND.