# SDR 2006UALA00059

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 11, 2006
- Submitted: January 17, 2006
- Operation: Air carrier
- Aircraft: [N837UA](https://openairdocs.org/aircraft/N837UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 1474
- Aircraft time: 16,458 hours, 6,569 cycles
- Engine: Iae V2522A5
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning Light
- Condition: Illuminated
- Location: Nr 2 A/C Pack
- Stage of operation: CL
- 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/2006UALA00059

## Discrepancy

RTF DUE TO NR 2 PACK ECAM FAULT MSG AND NR 1 PACK ALREADY DEFERRED.  NR 2 PACK OVERHEAT WAS REPORTED WITH NR 1 PACK ALREADY DEFERRED.  NR 2 PACK FAULT DISPLAYED ON THE UPPER ECAM SCREEN.  REMOVED AND REPLACED NR 2 ACM (MR21552), 11HM1, PER MM-21-52-21. OP-CHECK AND LEAK CHECK WAS GOOD.  FOLLOWING REPLACEMENT OF ACM, TWO DAYS LATER, THE DIFFERENTIAL PRESSURE SENSOR 9HB (PCN 565-2246) WAS REPLACED PER MM 21-51-11.  OP-CHECK GOOD, NO MESSAGES OR FAULTS.

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