# SDR QEMY201811050001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 5, 2018
- Submitted: November 5, 2018
- Operation: General aviation
- Filed by: [GE Aircraft Engine Services Ltd, repair station QEMY466L](https://openairdocs.org/faa-repair-station/QEMY466L/ge-aircraft-engine-services-ltd.md) (OpenAirDocs)
- Aircraft: N466L
- Make and model: Boeing 747*
- Engine: Rroyce RB211524*
- Engine time: 120,747 hours, 13,816 cycles
- System (JASC): [7250 · Turbine Section](https://openairdocs.org/jasc/7250)
- Part: Turbine Wheel
- Part number: UL29026
- Condition: Cracked
- Location: Engine
- Part time: 107,188 hours, 14,409 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QEMY201811050001

## Discrepancy

DURING AN INCOMING INSPECTION,  THE LP TURBINE STAGE 2 DISC WAS FOUND WITH SEVERAL FIRTREE CRACKING FAR IN EXCESS OF 72-51-61 REP 041/  DRESSING OF CRACKS IN FIRTREES LIMITS OF 0.250". SINGLE CRACK AND 2.5" CUMULATIVE
CRACKING. ACTUAL SINGLE CRACKS UP TO 1 INCH AND CUMULATIVE 21.2 INCH.   REMOVED FROM SERVICE ON INTERNAL MRB 130001456154.

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