# SDR ASAA2016010714673

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 7, 2016
- Submitted: January 12, 2016
- Operation: Air carrier
- Aircraft: [N453AS](https://openairdocs.org/aircraft/N453AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36354
- Aircraft time: 7,926 hours, 2,566 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989084
- Part serial: 20747
- Condition: Failed
- Location: Rt Temp
- Part time: 7,914 hours, 2,563 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016010714673

## Discrepancy

WHILE TROUBLESHOOTING MEL 21-32B, FOUND RT SIDE TEMP CONTROL VALVE INOPERATIVE.  ACFT GROUNDED.  REMOVED AND INSTALLED NEW RT SIDE TEMP CONTROL VALVE REF AMM 21-51-10.  PERFORMED BITENR 2 PZT CONTROLLER IAW AMM 21-51-00.  PERFORMED RT PACK GROUND CK. NO LEAKS NOTED. SYS CKS NORMAL.

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