# SDR ASAA2021061035094

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 10, 2021
- Submitted: June 15, 2021
- Operation: Air carrier
- Aircraft: [N536AS](https://openairdocs.org/aircraft/N536AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35203
- Aircraft time: 34,370 hours, 9,883 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulating Valve
- Part number: 3989085
- Part serial: 26022
- Condition: Overheated
- Location: Left Ecs Bay
- Part time: 16,510 hours, 5,132 cycles
- Stage of operation: DE
- How discovered: O
- Nature of condition: M
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021061035094

## Discrepancy

REPORTS OF CONTROL CABIN AND LEFT PACK SUPPLY TEMP GETTING HOT DURING DECENT. GROUNDED - YES. ACCOMPLISHED TSR710904. FOUND NO DEFECTS. REPLACED THE LEFT TCV AS SUGGESTED IN TSR. WORK ACCOMPLISHED IAW B737-800 AMM 21-51-10/401. SEAMC JARED NOTIFIED.

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