# SDR UIEA2017061100995

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 10, 2017
- Submitted: June 12, 2017
- Operation: Air carrier
- Aircraft: [N1321A](https://openairdocs.org/aircraft/N1321A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 27957
- Aircraft time: 80,670 hours, 18,443 cycles
- Engine: Ge CF680C2B6F
- System (JASC): [7500 · Engine Bleed Air System](https://openairdocs.org/jasc/7500)
- Part: Bleed Air Sys
- Condition: Oscillates
- Location: Left
- Stage of operation: CL
- How discovered: V
- Nature of condition: S
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2017061100995

## Discrepancy

LEFT BLEED PRESSURE OSCILLATES DURING CLIMB THRU 10000 FT, 15-50 PSI RANGE.  STOPS AT 10000 FT BUT REMAINS LOUDER THAN RIGHT BLEED.  NO BLEED SPLIT AT 410.  PACK OPS NORMAL. NO EICAS STATUS.  COMPLIED WITH FIM 36-10-01, FAULT TREE 803.  INSPECTED BOX AND FOUND LEFT HIGH PRESSURE CONTROLLER FAULTED.  INSPECTED VALVE AND FOUND A LOOSE LINE,  TIGHTENED THE LINE AND PERFORMED A BITE.  NO FAULTS INDICATED IAW FIM 36-10-01.

---
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.