# SDR ASAA2021110736522

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 7, 2021
- Submitted: November 9, 2021
- Operation: Air carrier
- Aircraft: [N493AS](https://openairdocs.org/aircraft/N493AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41727
- Aircraft time: 20,455 hours, 6,493 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: CR
- 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/ASAA2021110736522

## Discrepancy

LEFT PACK LIGHT ON RECALL PRIOR TO DESCENT. GROUNDED - YES. ACCOMPLISHED BITE OF BOTH PZTC REF B737-900 FIM 21-62 TASK 801 LEFT ON BIT FAULTED EXIT SRADA, REST OF BIT GREEN GO. RIGHT PZTC NO FAULTS. RESET LEFT PZTC RAN PACKS AND RE-ACCOMPLISHED BITE WITH NO FAULTS, OPS CKD NML.

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