# SDR ASAA2021090335851

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2021
- Submitted: September 7, 2021
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 46,911 hours, 13,867 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/ASAA2021090335851

## Discrepancy

LEFT PACK LIGHT COMES ON DURING MASTER CAUTION RECALL. GROUNDED - YES. FOUND TCV FAULT ON #1 PACK CONTROLLER PERFORMED B737-800 FIM 21-61 TASK 801, OPS CHECK PASSES TWO TIMES ON BOTH #1 AND #2 PACK CONTROLLER. A/C OK FOR SERVICE.

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