# SDR ASAA2018111976879

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 17, 2018
- Submitted: November 19, 2018
- Operation: Air carrier
- Aircraft: [N457AS](https://openairdocs.org/aircraft/N457AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36355
- Aircraft time: 19,127 hours, 6,340 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: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018111976879

## Discrepancy

AFTER ENGINE START LEFT PACK LIGHT ILLUMINATED. PERFORMED QRH PROCEDURE AND LIGHT EXTINGUISHED ON MASTER CAUTION RESET. GROUNDED - YES. CHECKED #1 PACK/ZONE TEMP CTRLR SHOWS "TCV THIS PACK" FAULT. RESET. FAULT DID NOT RETURN. OPS/BITE CHECK SAME GOOD. REF B737-900 AMM 21-51-00. FUNCTIONAL CHECK LT PACK TCV GOOD. GND VERIFICATION GOOD.

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