# SDR IPXA2019120659733

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 3, 2019
- Submitted: January 8, 2020
- Operation: Air carrier
- Aircraft: [N405UP](https://openairdocs.org/aircraft/N405UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 23727
- Aircraft time: 33,886 hours, 23,254 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Tube
- Condition: Damaged
- Location: Rt A/C Pack
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2019120659733

## Discrepancy

AT 27,000 FT,  CABIN ALTITUDE RED WARNING EICAS, CREW PERFORMED AN EMERGENCY,  DESCENDED TO 10,000 FT, APPROACHING 10,000 FT, THE CABIN ALTITUDE AUTO STATUS MESSAGE,  CREW HEARD A LOUD AIR HISSING NOISE,   COULDN`T DETERMINE SOURCE OF  SOUND.   REPOSITIONED & SECURED THE SUPPLY DUCTS. - DAMAGED PACK,   REMOVED THE DAMAGED LINE & REPLACED WITH A TEMP FLEX LINE.  R & R THE RIGHT PACK TUBE ASSY.

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