# SDR ASAA2018122437506

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2018
- Submitted: December 24, 2018
- Operation: Air carrier
- Aircraft: [N564AS](https://openairdocs.org/aircraft/N564AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35103
- Aircraft time: 46,475 hours, 14,025 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Valve
- Condition: Faulted
- Location: Cockpit Temp
- Stage of operation: TX
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018122437506

## Discrepancy

DURING AFTER START CHECKLIST WHEN RECALL PUSHED THE AIR COND AND CABIN ZONE TEMP LIGHTS ILLUMINATED. LIGHTS EXTINGUISHED WHEN MASTER CAUTION RESET. CHECKLIST COMPLETED. GROUNDED - YES. BITE CKD BOTH PTC #2 ON BIT & PREV FLT FLT DECK TRIM VALVE FAULTED WITH A GREEN ON GO/VERIFY. RESET AND RAN BOTH PACKS, REACCOMPLISHED BITE OF BOTH CONTROLLERS WITH NO FURTHER FAULTS REF B737-800 FIM 21-62 TASK 801 ALL OPS CKD NML.

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