# SDR BSAASDR0724

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2007
- Submitted: September 24, 2007
- Operation: Air carrier
- Aircraft: N171ZV
- Make and model: Beech 1900D
- Registry model: [Beech 1900D](https://openairdocs.org/model/beech-1900d) (OpenAirDocs)
- Aircraft serial: UE171
- Aircraft time: 24,756 hours, 35,554 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Shutoff Valve
- Part number: 1143800595
- Part serial: 0332B
- Condition: Inoperative
- 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/BSAASDR0724

## Discrepancy

DURING CLIMB THE LEFT ENVIROMENTAL FAIL LIGHT ILLUMINATED AND WOULD NOT RESET.  UPON RETURN TO BOSTON THE DISCREPANCY WAS INITIALLY DEFERRED.  AFTER RETURN TO BOSTON THE RT PRESSURE REGULATING SHUT OFF VALVE WAS REMOVED AND REPLACED.  GROUND CHECK GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.