# SDR DXTA200702428

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 24, 2007
- Submitted: September 5, 2007
- Operation: Air carrier
- Aircraft: N368QS
- Make and model: Cessna 680CE
- Aircraft serial: 6800073
- Aircraft time: 1,225 hours, 862 cycles
- Engine: Pwc PW306C
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Power Loss
- Stage of operation: CL
- 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/DXTA200702428

## Discrepancy

AFTER TAKEOFF, LEVELED OFF AT 2000 FT WHEN REDUCING POWER ON BOTH ENGINES TO 70 PERCENT N1 BOTH ENGINES SURGED +/- 5 TO 10 PERCENT.  BOTH ENGINES STABILIZED AFTER APPROXIMATELY 60 TO 90 SECONDS.  DOWNLOADED EDU'S IAW MM CH 77-40-01.  RAN ENGINES REPRODUCED SQUAWK TOOK SNAPSHOTS DURING OSCILLATIONS.  DOWNLOADED EDU'S AGAIN.  THESE OSCILLATIONS ARE DESCRIBED IN SIL PW300-081.  IAW THIS SL. THE ENGINE IS ALLOWED AN OSCILLATION WITH AN AMPLITUDE OF 6 PERCENT N1 NO FURTHER MAINTENANCE ACTION IS REQUIRED.

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