# SDR UIEA200800029

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 6, 2008
- Submitted: February 21, 2008
- Operation: Air carrier
- Aircraft: [N522MC](https://openairdocs.org/aircraft/N522MC), registered now
- Make and model: Boeing 747-2D7B
- Registry model: [Boeing 747-2D7B](https://openairdocs.org/model/boeing-747-2d7b) (OpenAirDocs)
- Aircraft serial: 21783
- Aircraft time: 99,406 hours, 19,929 cycles
- Engine: Ge CF680
- System (JASC): [8300 · Accessory Gearboxes](https://openairdocs.org/jasc/8300)
- Part: Gearbox
- Condition: Cracked
- Location: Zone 400
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA200800029

## Discrepancy

NR 4 ENGINE GEAR BOX WAS FOUND WITH A 3.0 INCH CRACK ON INBOARD SIDE OF FUEL PUMP DRIVE PAD AREA.  ENGINE CHANGE IS CURRENTLY IN PROGRESS.

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