# SDR REXA2012020900221

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2012
- Submitted: February 13, 2012
- Operation: Air carrier
- Aircraft: [N8783E](https://openairdocs.org/aircraft/N8783E), registered now
- Make and model: Cndair CL6002B19
- Aircraft serial: 7783
- Aircraft time: 20,041 hours, 17,552 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Shutoff Valve
- Condition: Malfunctioned
- Location: Ac Bay
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/REXA2012020900221

## Discrepancy

AIR RETURN FOR AUTO PRESS CONTROL NOT HOLDING PSI, SWITCHED TO MANUAL, & COULD BARELY CONTROL PRESSURE.  MANUAL RATE FULL INCREASE & MANUAL ALT IN DOWN POSITION VARIED BETWEEN 200-600FPM.  REMOVED AND REPLACED PRSOV IAW AMM 21-51-43.  PERFORMED OPS CHECK OF LT PACK IAW AMM 21-51-00.  OPS CHECK GOOD.  PERFORMED OPS CHECK OF CABIN PRESSURE IAW 21-31-00.  OPS CHECK GOOD.  OK FOR SERVICE.  VERIFIED PART EFFECTIVITY.

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