As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SINGLE CONTROLLER FAILURE ON BOTH PACKS. PACK LIGHT CAME ON AND RESET MULTIPLE TIMES. ERRATIC CABIN VVI. LEVELED OFF AT 180FL AN RETURNED TO DEPARTURE FIELD. T/S FOUND BLEED MANIFOLD CLAMP LEAKING, RETORQUED CLAMP PER AMM 36-11-00. BITE PACK CONTROLS NO FAULTS. RAN PACK SYSTEM NO LEAK NOTED LEFT PACK OPS SYSTEM GOOD REF FIM 21-31-00-810-801.