# SDR AALA202103139005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 9, 2021
- Submitted: March 14, 2021
- Operation: Air carrier
- Aircraft: [N991AN](https://openairdocs.org/aircraft/N991AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30920
- Aircraft time: 35,665 hours, 14,468 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Sensor
- Part number: 1296663
- Part serial: 16700
- Condition: Faulty
- Location: Lt A/C Pack
- Part time: 1,624 hours, 713 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202103139005

## Discrepancy

AIRCRAFT WAS GROUNDED: FLIGHT DIVERTED TO LAS FOR LH PACK FAILURE. REPLACED PRECOOLER SENSOR 390 AND PRECOOLER VALVE (AALA202103139004) IAW AMM 36-12-03, AMM 36-12-01, AND JOB CARD JC08L40036001, OPS CHECK GOOD.

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