# SDR SWAA2013121223250

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2013
- Submitted: December 13, 2013
- Operation: Air carrier
- Aircraft: N786SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29811
- Aircraft time: 47,725 hours, 27,782 cycles
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Hmu
- Part number: 442369
- Part serial: BECW0767
- Condition: Faulty
- Location: Nr 2 Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2013121223250

## Discrepancy

AIR TURN BACK CLIMBING FROM 12000 TO 15000 NR 2 ENG STARTING SURGING FROM 62% N1 TO 79% N1 WITH AUTO THROTTLES ENGAGED INITIALLY.  SURGE CONTINUED WITH AUTO THROTTLES OFF.  R & R NR 2 ENG HMU & FUEL PUMP PACKAGE IAW MT.

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