# SDR ASAA0956578

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 8, 2009
- Submitted: September 10, 2009
- Operation: Air carrier
- Aircraft: [N558AS](https://openairdocs.org/aircraft/N558AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35177
- Aircraft time: 12,308 hours, 3,520 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Valve
- Part number: 3989083
- Part serial: 8743
- Condition: Faulty
- Location: Lt Ac Pack
- Part time: 12,308 hours, 3,520 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA0956578

## Discrepancy

LEFT PACK LIGHT ILLUMINATED AFTER RECALL RESET WITH MASTER CAUTION LIGHT EXTINGUISHED.  ACCOMP PACK/ZONE TEMP CONT BITE CHECK RECORDED TCV FAULT LT PACK.  REMOVED & REPLACED LT PACK TCV LEAK & OPS NORMAL REF M/M 21 51 10.  ALL FAULTS CLEARED BITE CHECK GOOD REF M/M 21 61 00.  VLV P/N VERIFIED EFFECTIVE REF IPC 21 51 10 03 ITEM 090.

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