# SDR ASAA2023020541844

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 5, 2023
- Submitted: February 8, 2023
- Operation: Air carrier
- Aircraft: [N453AS](https://openairdocs.org/aircraft/N453AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36354
- Aircraft time: 34,183 hours, 10,753 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Not Reported
- Part number: NOTREPORTED
- Condition: Not Reported
- Location: Not Reported
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023020541844

## Discrepancy

LH PACK LIGHT ON MASTER CAUTION RECALL EXTINGUISHES ON MASTER CAUTION RESET. GROUNDED - YES. ACCOMPLISHED PACK TEMP CONTROL BITE PROCEDURE #1 CONTROLLER SHOWED TCV FAULT WAS ABLE TO RESET. RAN BITE CK 2 MORE TIMES NO FAULTS NOTED. #2 CONTROLLER CK GOOD NO FAULTS NOTED. MASTER CAUTION RECALL NO LH PACK LIGHT GROUND VERIFICATION CK GOOD REF B737-900 FIM 21-62 TASK 801.

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