# SDR SWAA050628

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 1, 2005
- Submitted: March 3, 2005
- Operation: Air carrier
- Aircraft: N742SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29278
- Aircraft time: 22,981 hours, 13,507 cycles
- Engine: Cfmint CFM567B22
- System (JASC): [7321 · Fuel Control/Turbine Engines](https://openairdocs.org/jasc/7321)
- Part: Ecu
- Part number: 1852M33P05
- Part serial: LMDN4472
- Condition: Faulty
- Location: Nr 1 Engine
- 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/SWAA050628

## Discrepancy

AIR TURNBACK, DECLARED EMERGENCY.  DURING TAKEOFF ROLL, NR 1 ENGINE POWER, ALL PARAMETERS BECAME ERRATIC.  THROUGH CLIMBOUT, ALL PARAMETERS FLUCTUATING, AROUND 10,000 FT, 2 LOUD COMPRESSOR STALLS.  REMOVED AND REPLACED NR 1 EEC AND NR 1 VBV PER MM.

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