# SDR ASAA2021041034537

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 2021
- Submitted: April 12, 2021
- Operation: Air carrier
- Aircraft: [N597AS](https://openairdocs.org/aircraft/N597AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35689
- Aircraft time: 47,314 hours, 14,228 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning Light
- Condition: False Activation
- Location: Lt A/C Pack
- Stage of operation: NR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021041034537

## Discrepancy

LEFT PACK ILLUMINATES ON RECALL. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 21-53 TASK 801. SHOW TCV FAULT, AFTER RESET PZTC #1, LEFT PCK LIGHT NOT ACTIVE WITH RECALL TEST, OPS BOTH L& R PACK FOR SEVERAL MINUTES TO FULL COOL AND FULL WARM, RECALL TEST AND BOTH L & R PZTC BITE PASSED, B737-800 AMM 21-00-00.

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