# SDR SWAA2013112022629

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 19, 2013
- Submitted: November 20, 2013
- Operation: Air carrier
- Aircraft: [N228WN](https://openairdocs.org/aircraft/N228WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32496
- Aircraft time: 28,464 hours, 16,823 cycles
- Engine: Ge CFM567B24
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Control Valve
- Part number: 32911866
- Part serial: GRTS3511
- Condition: Faulty
- Location: Nr 1 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/SWAA2013112022629

## Discrepancy

AIR TURN BACK, DECLARED EMERGENCY AFTER TAKEOFF, TOWER REPORTED FROM GROUND VEHICLE CONTRAIL FROM LT ENGINE NR 1 CLIMBING THROUGH 12,000 FEET WE HAD A 600 POUND IMBALANCE.  R &R HPT CLEARANCE CONTROL VALVE IAW MM.

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