# SDR UALA2010010500073

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 5, 2010
- Submitted: January 7, 2010
- Operation: Air carrier
- Aircraft: [N647UA](https://openairdocs.org/aircraft/N647UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 25284
- Aircraft time: 76,803 hours, 12,474 cycles
- Engine: Pwa PW4060
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Sense Line
- Condition: Unsecure
- Location: Hpsov
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010010500073

## Discrepancy

CREW STATES THAT RT PACK OFF LIGHT ON WHEN ENGINE BLEEDS ARE ON. PACK RUNS OK WITH APU BLEED.   RT PACK OFF LIGHT ON WHEN ENGINE BLEEDS ARE ON. PRV  VALVE REPLACED, NO HELP. CONTINUING TO TEST.  FOUND SENSE LINE AT HPRSOV NOT TOTALLY TIGHTENED.  ADJUSTED AND RAN ENGINE TWICE, FOUND RT PACKS WORKS 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.