As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TRIM AIR SUPPLY NOT AVAIL IN ANY MODE OR CONFIG AS EVIDENCED BY SUPPLY DUCT TEMPS ON ECS PAGE. TRIM AIR REGULATING VALVE FOUND LEAKING THRU CAB PRESSURE PORT. VALVE REPLACED. RAN PACKS AND PRESSURIZED AIRCRAFT TO 4 PSI. ALL OPS NORMAL WITH HEAT AVAILABLE THROUGHOUT CHECK.