As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT NOTICED CABIN NOT PRESSURIZING A 10,000 FT. DIFFERENTIAL PRESURE INDICATING LESS THAN 1,OOOFT NOT RIGHT PACK ALREADY MEL INOP, CAB UNCONTROLLABLY HOT, AIRFLOW VERY WEAK. MAINTENANCE REMOVED AND REPLACED RIGHT FLOW CONTROL AND SHUT OFF VALVE AMM 21-51-01 LEAK CHECK AND BITE CHECK GOOD IAW AMM 21-51-04. ACCOMPLISHED CABIN PRESSURE TEST IAW AMM 05-51-96. OPS CHECK NORMAL.