# SDR 2010FA0000477

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 17, 2010
- Submitted: May 17, 2010
- Operation: General aviation
- Aircraft: N545SG
- Make and model: Boeing 747-200
- Registry model: [Boeing 747-200](https://openairdocs.org/model/boeing-747-200) (OpenAirDocs)
- Aircraft serial: 22545
- Aircraft time: 93,489 hours, 16,830 cycles
- System (JASC): [5420 · Nacelle/Pylon Miscellaneous Structure](https://openairdocs.org/jasc/5420)
- Part: Stiffener
- 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/2010FA0000477

## Discrepancy

PYLON NR 1 STIFFENER LOWER FLANGE NO.3 CRACK AT NAC. STA.256

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