# SDR NWAA084066731

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 22, 2008
- Submitted: September 12, 2008
- Operation: Air carrier
- Aircraft: N631NW
- Make and model: Boeing 747251B
- Aircraft serial: 23111
- Aircraft time: 88,957 hours, 13,513 cycles
- System (JASC): [5411 · Nacelle/Pylon, Frame/Spar/Rib](https://openairdocs.org/jasc/5411)
- Part: Frame
- Condition: Cracked
- Location: Nr 4 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/NWAA084066731

## Discrepancy

DURING L CHECK FOUND CRACK IN NR 4 PYLON REAR ENGINE MOUNT BULKHEAD FORWARD FRAME AT NAC STA 222.90.  REPAIRED PER EA 67-213556.

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