# SDR 2008UALA00833

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2008
- Submitted: February 14, 2008
- Operation: Air carrier
- Aircraft: [N668UA](https://openairdocs.org/aircraft/N668UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 30024
- Aircraft time: 31,612 hours, 8,768 cycles
- Engine: Pwa PW4052
- Engine time: 33,984 hours, 6,280 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Nut
- Condition: Broken
- Location: Nr 2 Igv
- Stage of operation: TO
- How discovered: O
- Nature of condition: W
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2008UALA00833

## Discrepancy

NR 2 ENGINE SLOW TO SPOOL AT TAKEOFF.  THIS ENGINE HAD AN N2 OVERSPEED OF 105.6%. THE ENGINE WAS REPLACED AT SFO PRIOR TO FURTHER FLIGHT. THE IGV UNISON RING ADJUSTER ROD END CLEVIS CONNECTOR ON THE BELLCRANK WAS DISCONNECTED DUE TO A BROKEN SLEEVE NUT.  (IPC 72-35-00-025-040)
BECAUSE THE OVERSPEED EXCEEDED 105.0% FOR 9 SECONDS, ALL STAGE-5, -6, AND-7 BLADES WILL BE SCRAPPED DUE TO CONCERN OF HIGH CYCLE FATIGUE.

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