# SDR ASAA2021111636626

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2021
- Submitted: November 18, 2021
- Operation: Air carrier
- Aircraft: [N590AS](https://openairdocs.org/aircraft/N590AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35687
- Aircraft time: 50,488 hours, 15,065 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: DE
- 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/ASAA2021111636626

## Discrepancy

ON DESCENT AND DURING RECALL GOT LEFT PACK LIGHT AND DURING MASTER RECALL IT RESET THE LIGHT EXTINGUISHED. GROUNDED - YES. PERFORMED PACK TEMP. CONTROL BITE TEST IAW B737-800 FIM 21-62 TASK 801. FOUND TEMP CONTROL VALVE FAULT WAS INTERMITTENT DURING PREVIOUS FLIGHT. FAULT CLEARED AFTER PUSHING "VERIFY" SWITCH ON THE CONTROLLER. AIRCRAFT OK FOR SERVICE.

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