# SDR SWIA201642485

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2016
- Submitted: August 29, 2016
- Operation: Air carrier
- Aircraft: [N874AS](https://openairdocs.org/aircraft/N874AS), registered now
- Make and model: Cndair CL6002B19
- Aircraft serial: 7551
- Aircraft time: 33,988 hours, 30,429 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Shutoff Valve
- Condition: Malfunctioned
- Location: Lt A/C Pack
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, G, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWIA201642485

## Discrepancy

ACFT LOST PRESSURIZATION, NOT PRESSURIZING, NO OUTPUT FROM PACK AT 24K FEET, DECLARED EMERGENCY & DESCENDED.  CREW FOLLOWED QRH AND 
DEPLOYED MASKS.  PASSENGER USED MASKS.  REMOVED AND REPLACED LT PACK PRSOV AND BOTH PACK OVERPRESSURE SWITCHES IAW AMM. OPERATIONAL CHECK GOOD AT THIS TIME.

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