As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: RH PACK LIGHT ILLUMINATED ENROUTE, ONE RESET ATTEMPT AT FL340 WAS UNSUCCESSFUL; FLIGHT RETURNED TO FIELD AND LANDED WITHOUT FURTHER INCIDENT. REPLACED RH AIR CYCLE MACHINE WITH SERVICEABLE UNIT IAW AMM 21-52-02, OPS CHECK GOOD.