# SDR SWAA013120

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 15, 2001
- Submitted: November 20, 2001
- Operation: Air carrier
- Aircraft: [N799SW](https://openairdocs.org/aircraft/N799SW), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 28209
- Aircraft time: 11,479 hours, 5,854 cycles
- Engine: Ge CFM56*
- Engine time: 11,479 hours, 5,854 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Part number: CFM56
- Part serial: 874130
- Condition: Failed
- Location: Nr 1
- Stage of operation: CR
- How discovered: O
- Nature of condition: Y, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA013120

## Discrepancy

(IN-FLIGHT ENG SHUT DOWN, DECLARED EMERGENCY, DIVERSION ) DURING CRUISE NR 1 ENGINE ABRUPTLY MADE A LOUD BANG, FOLLOWED BY A/C SHUTTER AND ABRUPT ROLLBACK OF BOTH N1 & N2 AND EGT (SCALES WENT BLANK).  LANDED WITH NR 1 ENG SHUT DOWN.  FOUND METAL AT THE NR 1 ENG FWD SUMP CHIP DETECTOR.  REMOVED AND REPLACED NR 1 ENG PER MM.

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