# SDR USAA070425

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 5, 2007
- Submitted: June 5, 2007
- Operation: Air carrier
- Aircraft: N420US
- Make and model: Boeing 737401
- Aircraft serial: 23987
- Aircraft time: 50,436 hours, 50,436 cycles
- System (JASC): [5720 · Wing Miscellaneous Structure](https://openairdocs.org/jasc/5720)
- Part: Flange
- Condition: Cracked
- Location: Lws 135
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA070425

## Discrepancy

CRACK AT WBL 135.5 AT LEFT WING, LOWER CHORD FLANGE HAS CRACK.  INSTALLED DOUBLER PER EA 98655, DEFECT SIZE:  2 INCHES.

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