# SDR O2GA2016120150101

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 1, 2016
- Submitted: December 6, 2016
- Operation: Air carrier
- Aircraft: [N501UP](https://openairdocs.org/aircraft/N501UP), registered now
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605252
- Aircraft time: 10,672 hours, 7,581 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Valve
- Part number: 99125182
- Part serial: 2AT35F
- Condition: Defective
- Location: Cockpit Temp
- Part time: 31,512 hours, 2,367 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: M, B, J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/O2GA2016120150101

## Discrepancy

DURING PREFLIGHT INSPECTION, THE ACM OVERHEAT ANNUNCIATOR ILLUMINATED WHILE APU WAS RUNNING.  E6/E5 FAULT CODE ON TEMPERATURE CONTROLLER. SMOKE IN COCKPIT OBSERVED. MAINTENANCE TROUBLESHOT THE DISCREPANCY TO A FAULTY RIGHT COCKPIT TEMPERATURE CONTROL VALVE. INSPECTED DUCTS AND WIGGINS CLAMPS FOR LEAKS. NONE NOTED. OPERATIONAL CHECKS COMPLIED WITH. AIRCRAFT WAS RETURNED TO SERVICE.

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