As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: PACK L ANNUNCIATION CAME ON. RAN CHECKLIST. CREW CALLED DISPATCHTO MX PATC. ADVISED ABOUT A STATUS MSG AND RESET. FEW MIN LATER PACK L CAME ON AGAIN. DIVERTED TO KJFK. NO ETOPS FUEL DUMPED. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED L PACK FLOW CONTROL VALVE ( LOW ) IAW AMM 21-51-02.