# SDR S2YA05083

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2005
- Submitted: February 8, 2006
- Operation: Air carrier
- Aircraft: [N87SK](https://openairdocs.org/aircraft/N87SK), registered now
- Make and model: Beech 1900D
- Registry model: [Beech 1900D](https://openairdocs.org/model/beech-1900d) (OpenAirDocs)
- Aircraft serial: UE87
- Engine: Pwa PT6A67D
- System (JASC): [2100 · Air Conditioning System](https://openairdocs.org/jasc/2100)
- Part: Line
- Condition: Loose
- Location: Cabin Air
- Stage of operation: CR
- 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/S2YA05083

## Discrepancy

DURING FLIGHT, THE CREW REPORTED RT ENVIRO FAIL AND CABIN ALT HIGH.  SINCE THE FLIGHT LEVEL WAS RESTRICTED TO 9500 FT THE CREW PERFORMED AN AIR-TURN-BACK.  MX REPLACED THE LT PRSOV BUT THAT DID NOT FIX THE PROBLEM.  MX INSPECTED THE SYSTEM AND FOUND A LOOSE TEST LINE AFTER TIGHTENING THE LINE THE SYSTEM OPS CHECKED GOOD AND THE AC WAS RETURNED TO SERVICE.  (K)

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