# SDR SWAA2025071089177

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2025
- Submitted: July 10, 2025
- Operation: Air carrier
- Aircraft: [N8647A](https://openairdocs.org/aircraft/N8647A), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 42528
- Aircraft time: 36,379 hours, 17,716 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Blade
- Condition: Out Of Limits
- Location: Nr 1 Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: E, R, A
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2025071089177

## Discrepancy

ON DEPATURE, NR 1 ENGINE MADE AT LEAST 2 LOUD BANGS, SHOOK THE ACFT AND CREATED A YAW. TOWER AND PAX REPORTED LARGE FLAMES SHOOTING OUT OF THE ENGINE.  ENGINE ROLLED BACK ON ITS OWN.  REDUCED THROTTLE AND IT STABLIZED.  PERFORMED NR 1 ENGINE BORESCOPE INSPECTION, FOUND ENGINE HIGH PRESSURE COMPRESSOR STAGE 2 HAD A ROUND BOTTOM DENT ON 1 EA BLADE AT THE LEADING EDGE, 0.395 FROM THE TIP OF THE LEADING EDGE. THE DEPTH OF THE DENT IS 0.051 DEEP.  ACCORDING TO AMM 72-00-00-200804-F00, SUBTASK 72-00-00-210-018-F00 (G) (2) (D), THE ALLOWABLE LIMIT IS 0.030 DEEP.  BLADE IS OUT OF LIMITS.

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