As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: REPORTS OF BURNING SMELL, SMOKE IN THE COCKPIT WITH PACKS ON. RT PACK TRIPPED DURING TAXI TO GATE WITH R PACK ACM MSG IN EICAS/STATUS MSG. MAINTENANCE REMOVED AND REPLACED RT ACM IAW AMM 21-52-02. LEAK CHECK OK. OPS CHECK OK.