# SDR DXTA200701998

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 4, 2007
- Submitted: March 5, 2007
- Operation: Air carrier
- Aircraft: [N149QS](https://openairdocs.org/aircraft/N149QS), registered now
- Make and model: Beech 400A
- Registry model: [Beech 400A](https://openairdocs.org/model/hawker-beechcraft-400a) (OpenAirDocs)
- Aircraft serial: RK473
- Aircraft time: 466 hours, 426 cycles
- Engine: Pwa JT15D5
- 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, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA200701998

## Discrepancy

AFTER LEVEL OFF FOLLOWING AN UNRESTRICTED CLIMB TO FL 380, LT ENGINE BEGAN TO SURGE +- 2 PERCENT N1 (APPROX). ENGINE SYNC-ON. EGT, N2 AND FUEL FLOW WERE ALSO FLUXUATING WITH FUEL FLOW =- 50 TO 75 PSI. ENGINE SYNC TURNED OFF WITH NO CHANGE (STILL FLUXUATING). BOTH ENGINE ANTI-ICE SYSTEMS WERE TURNED (ON) AND ABOUT 3 SEC TO 1 MINUTE LATER ALL ENG PARAMETERS RETURNED TO NORMAL (ENG. TREND LOG TAKEN AND FAXED SEPERALY) SHORTLY BEFORE DECENT ENG. A/I TURNED OFF (STILL AT FL 380) ENGINE AGAIN BEGAN TO SURGE.  ENG A/I TURNED BACK (ON) ALL PARAMETER RETURNED TO NORMAL (FUEL WAS SUMPED PRIOR TO FLT CLEAN). DURING CLIMBOUT AND AT LOWER ALTITUDES (OAT >10 DEGREES C) ALL ENG PARAMETERS NORMAL

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