# SDR ASAA2014050907735

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 9, 2014
- Submitted: May 12, 2014
- Operation: Air carrier
- Aircraft: [N588AS](https://openairdocs.org/aircraft/N588AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35685
- Aircraft time: 24,780 hours, 7,604 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Modulating Valve
- Part number: 3989083
- Part serial: 10108
- Condition: Malfunctioned
- Location: A/C Bay
- Part time: 24,790 hours, 7,606 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014050907735

## Discrepancy

DURING RECALL, ZONE TEMP ILLUMINATED FOR CONTROL CABIN.  EXTINGISHED AT MASTER CAUTION RESET.  ACFT GROUNDED.  REPLACED CONTROL CABIN TRIM AIR MODULATING VALVE IAW AMM 21-61-21-000-801/-400-801. OPS AND LEAK CHECKED GOOD.

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