As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COULD NOT CONTROL CABIN TEMP -THEN RAN ABNORMAL PROCEDURES. AFFECTED PAC WAS TURNED OFF. ONCE PARKED AT FBO CABIN FILLED WITH SMOKE. KHPN-KFLL.REMOVED DEFECTIVE CABIN PAC. INSTALLED REPAIRED UNIT. ALSO REPLACED BOTH CABIN & COCKPIT COALESCER P/N 746451-3 OPS CK OF ECU'S GOOD. WORK DONE I/A/W CESSNA CITATION X M/M CHAPTER 21-51-00.