As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 30 JFK-ROC, ON FINAL APPROACH THE CABIN TEMP GOT REAL HOT FOLLOWED BY SMELL OF ELECTRICAL AND RUBBER BURN (AIR CONDITIONING PACKS-SINGLE). FAULT CODE 21516310AM1 ENCOUNTERED ON CMC. PER FIM TASK 21-51-00-810-823A, REMOVED AND REPLACED PACK 2 BYPASS VALVE PER AMM 21-51-10. OPS CHECK GOOD.