# SDR UIEA200700221

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 7, 2007
- Submitted: May 17, 2007
- Operation: Air carrier
- Aircraft: N523MC
- Make and model: Boeing 747-2D7B
- Registry model: [Boeing 747-2D7B](https://openairdocs.org/model/boeing-747-2d7b) (OpenAirDocs)
- Aircraft serial: 21782
- Aircraft time: 92,606 hours, 18,914 cycles
- System (JASC): [5415 · Nacelle/Pylon, Attach Fittings](https://openairdocs.org/jasc/5415)
- Part: Attach Angle
- Condition: Cracked
- Location: Nr 1 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/UIEA200700221

## Discrepancy

NR 1 PYLON AFT MOUNT BULKHEAD FITTING CAP SKIN ATTACH ANGLE BOTH SIDES FOUND CRACKED.  THE CHORD CRACKED FLANGES WERE REMOVED BY TRIMMING PER SRM 51-10-01.  THE EDGES AND FASTENER HOLE WERE NDT INSPECTED.  FILLERS AND REPAIR ANGLES WERE INSTALLED ON FORWARD AND AFT SIDES OF THE LEFT AND RIGHT CHORDS PER BOEING DOCUMENT 1-320850399-1.

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