# SDR SWAA970919

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 20, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N656SW
- Make and model: Boeing 737-3H4
- Registry model: [Boeing 737-3H4](https://openairdocs.org/model/boeing-737-3h4) (OpenAirDocs)
- Aircraft serial: 28401
- Engine: Ge CFM563B1
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Failed
- Location: Nr 1
- Stage of operation: CR
- Nature of condition: J, Y
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA970919

## Discrepancy

AFTER LEVELING OFF AT FL 330,  CREW NOTED NR 1 ENGINE OIL PRESSURE FLUCTUATING SLIGHTLY AS THRUST REDUCED.  IN ADDITION, AVM INDICATION SPIKED UP 2 UNITS, THEN RETURNED TO LESS THAN 1 UNIT.  A FEW MINUTES LATER, A LOUD BOOM WAS HEARD FOLLOWED BY NR 1 ENGINE SPOOLING DOWN.  CREW DECLARED AN EMERGENCY, AND MADE AN UNEVENTFUL LANDING AT BNA.  INSPECTED AND FOUND METAL PIECES INSIDE FAN COWL.  FURTHER INSPECTION FOUND A HOLE  IN ENGINE ACCESSORY GEARBOX JUST AFT OF STARTER PAD. ENGINE CHANGE IN PROGRESS.

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