As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. EMERGENCY DECLARED. DURING CLIMB THE RIGHT PACK TEMPERATURE INCREASED TO 120 DEGREES. RETURNED TO MIA. MAINTENANCE FOUND THE STANDBY TEMPERATURE CONTROL VALVE LINE DISCONNECTED. RECONNECTED LINE IAW AMM 21-51-11. LEAK AND OPERATIONAL CHECKS NORMAL.