# SDR ASAA2015012110345

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2015
- Submitted: January 23, 2015
- Operation: Air carrier
- Aircraft: [N565AS](https://openairdocs.org/aircraft/N565AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35181
- Aircraft time: 31,200 hours, 9,542 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Valve
- Part number: 3989084
- Part serial: 8625
- Condition: Malfunctioned
- Location: Lt A/C Pack
- Part time: 31,321 hours, 10,435 cycles
- Stage of operation: AP
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015012110345

## Discrepancy

LEFT PACK LIGHT CAME ON WITH RECALL DURING LANDING CHECK.  LIGHT WENT OUT ON MASTER CAUTION RESET.  ACFT GROUNDED.  INTERROGATED NR 1 ZONE TEMP CONTROLLER: FAULTED TCV THIS PACK & OTHER PACK. REPLACED LT PACK TCV.  REF'S: 21-61-00 & 21-51-10.  R & R RT PACK TCV REF: AMM 21-51-10.  ZONE TEMP CONTROLLER NR 1 BITE CK, GOOD.  LK CK GOOD.

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