# SDR ASAA2022080439380

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 4, 2022
- Submitted: August 8, 2022
- Operation: Air carrier
- Aircraft: [N419AS](https://openairdocs.org/aircraft/N419AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41734
- Aircraft time: 34,677 hours, 11,030 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Part number: UNKNOWN
- Condition: Warning Light
- Location: Unknown
- 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/ASAA2022080439380

## Discrepancy

RH PACK LIGHT ILLUMINATES ON MASTER CAUTION RECALL: EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. TROUBLESHOT PER FIM 21-53 TASK 821. FOUND THIS PACK TCV FAULT ON R/H TEMPERATURE CONTROLLER, TROUBLESHOT PER B737-900 FIM 21-62 TASK 831. PERFORMED PACK TEMP CONTROL BITE TEST, NO FAULTS FOUND. OPERATED BOTH PACKS WITH NO DEFECTS NOTED PER AMM 21-00-00 .

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