# SDR DXTA2025032002713

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2025
- Submitted: March 20, 2025
- Operation: Air carrier
- Aircraft: N599QS
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605714
- Aircraft time: 15,631 hours, 11,904 cycles
- Engine: Pwc PW545B
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Servo Valve
- Part number: 30J413301
- Part serial: Y000616
- Condition: Stalled
- Location: Lt Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2025032002713

## Discrepancy

LEFT ENGINE ENGINE COMPRESSOR STALL: UPON REACHING FL410 AND BEGINNING TO REDUCE THRUST FOR CRUISE, WE EXPERIENCED THREE DISTINCT COMPRESSOR STALLS WITH AIRCRAFT YAW AND A NOTICEABLE DROP IN N1 INDICATION ON THE NUMBER ONE ENGINE. CORRECTIVE ACTION; SWAPPED EECS & REPLACED SUSPECT FAILED LEFT ENGINE INTERCOMPRESSOR SERVO VALVE. WORK DONE IAW PW EMM 75-30-01. OPS/LEAK CHECK GOOD

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