As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT "AIR CONDITIONING FAIL" ANNUNCIATOR ILLUMINATED & EMERGENCY PRESSURIZATION ACTIVATED. PER ACFT CHECKLIST DESCENDED TO 10,000 FT & CLOSED BLEED AIR SOURCES. LANDING WAS UNEVENTFUL. TROUBLESHOT AND FOUND WIRE BROKEN IN AIR CYCLE TURBINE OVER PRESSURE SWITCH CONNECTOR. REPAIRED BROKEN WIRE. OPERATIONAL CHECK GOOD.