# SDR CALA2017100603497

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2017
- Submitted: October 6, 2017
- Operation: Air carrier
- Aircraft: [N798UA](https://openairdocs.org/aircraft/N798UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26928
- Aircraft time: 85,515 hours, 11,615 cycles
- Engine: Pwa PW4090
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Surges
- Location: Left
- Stage of operation: CR
- How discovered: O
- Nature of condition: R, E, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2017100603497

## Discrepancy

FL350 MACH .825 LEFT ENGINE SURGED, THEN ROLLED BACK.  LOUD AND HEAVY VIBRATION.  ACCOMPLISHED CALL OUT,  VISUALLY INSPECTED ENGINE IN AND OUT AND 2.9 BLEED VALVES FOUND NO DISCREPENCIES IAW FIM 71-05-00-810-819-N00.

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