# SDR UIEA200900038

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 2009
- Submitted: July 21, 2009
- Operation: Air carrier
- Aircraft: N524MC
- Make and model: Boeing 747-2D7B
- Registry model: [Boeing 747-2D7B](https://openairdocs.org/model/boeing-747-2d7b) (OpenAirDocs)
- Aircraft serial: 21784
- Aircraft time: 99,985 hours, 20,743 cycles
- System (JASC): [5714 · Wing, Center Box](https://openairdocs.org/jasc/5714)
- Part: Panel
- Condition: Cracked
- Location: Nr 3 Pylon
- 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/UIEA200900038

## Discrepancy

RT WING NR 3 PYLON UPPER SURFACE GAP PANEL HAS 2 EA COMPOSITE CRACKS.  STA ILES 666.22 CRACK IS 24.0 INCHES LONG AND AT ILES 670.22 CRACK IS 12.0 INCHES LONG.  PERMANENT REPAIR ACCOMPLISHED IAW SRM 51-40-09, FIG 18, SHEETS 2 AND 5, 250 DEGREE CURE IAW SRM 51-40-12. EO 4757A483.

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