# SDR IPXA2020073058411

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 28, 2020
- Submitted: July 31, 2020
- Operation: Air carrier
- Aircraft: [N421UP](https://openairdocs.org/aircraft/N421UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25281
- Aircraft time: 30,222 hours, 19,873 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Condition: Seized
- Location: Right
- 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/IPXA2020073058411

## Discrepancy

AT FL 370,  RECEIVED A CABIN ALT WARNING. LT PACK OFF, IN AUTO 2.  PRESSURIZATION WAS ABOVE 10,000 FT.  DECLARED EMERGENCY,  LANDED UNEVENTFULLY.  ACCOMPLISHED DMP 21-51-1.  RT ACM FOUND SEIZED WITH DEBRIS. REMOVED IAW AMM 21-51-03-004-001. ALSO FOUND WATER NOZZLE CLOGGED. INSTALLED RT ACM IAW AMM 21-51-03.  R & R RT WATER SPRAY NOZZLE IAW AMM 21-53-05. BOTH OP & LEAK CHECKED GOOD.

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