# SDR KCSA2015060206

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2015
- Submitted: June 4, 2015
- Operation: Air carrier
- Aircraft: [N740CK](https://openairdocs.org/aircraft/N740CK), registered now
- Make and model: Boeing 747-4H6
- Registry model: [Boeing 747-4H6](https://openairdocs.org/model/boeing-747-4h6) (OpenAirDocs)
- Aircraft serial: 24405
- Aircraft time: 72,996 hours, 12,872 cycles
- Engine: Ge CF680C2B1F
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Vibration
- Location: Nr 2
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCSA2015060206

## Discrepancy

AFTER ROTATION, CREW NOTICED A VIBRATION.  NR 3 ENGINE VIBRATION INDICATOR DISPLAYED HIGH. ALL OTHER ENGINE INDICATIONS WERE NORMAL. VIBRATION DISAPPEARED AFTER REDUCING BELOW TAKEOFF POWER SETTING. OPERATED NR 3 ENGINE AT IDLE THRUST FOR REMAINDER OF FLIGHT.  REVERSE NOT USED ON LANDING.  R & R NR 3 ENGINE IAW AMM 71-00-02 AND TASK CARD 71-001-00-00.  OPS & LEAK CHECKED GOOD IAW MM 71-00-00, TEST NR 8 AND TASK CARD 71-001-00-00. ACFT OK FOR CONTINUED SERVICE.

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