# SDR USAA2010061591124

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 19, 2009
- Submitted: June 15, 2010
- Operation: Air carrier
- Aircraft: N450UW
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24933
- Aircraft time: 51,561 hours, 34,160 cycles
- System (JASC): [5414 · Nacelle/Pylon, Plate/Skin](https://openairdocs.org/jasc/5414)
- Part: Skin
- Part number: 311A145028
- Condition: Cracked
- Location: 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/USAA2010061591124

## Discrepancy

SAL - Q4 - MAJOR REPAIR - CRACK ON INBOARD SIDE OF NR 1 ENGINE PYLON PASS STOP DRILL AT ACCESS PANEL NR 5724L CUTOUT BETWEEN NAC STA 254.5 TO NAC STA 277.6.  REPLACED SKIN PANEL ON INBOARD SIDE OF NR 1 ENGINE IAW B737 SRM 51-10-02 & BOEING DRAWING NR 311A1400.

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