# SDR HALA0800485

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 2, 2008
- Submitted: April 4, 2008
- Operation: Air carrier
- Aircraft: N591HA
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 33423
- Aircraft time: 19,867 hours, 3,824 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Spring
- Condition: Broken
- Location: Check Valve
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HALA0800485

## Discrepancy

ETOPS SIGNIFICANT SYSTEM, FOUND LT ISOLATION BYPASS CHECK VALVE SPRING BROKEN.  REMOVED AND REPLACED LT ISOLATION BYPASS CHECK VALVE PER AMM 36-11-04.  OPS AND LEAK CK OK.                



---
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.