# SDR DALA1031325523

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 1, 2010
- Submitted: November 15, 2010
- Operation: Air carrier
- Aircraft: [N523US](https://openairdocs.org/aircraft/N523US), registered now
- Make and model: Boeing 757251
- Aircraft serial: 23617
- Aircraft time: 76,752 hours, 31,689 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Condition: Corroded
- Location: Fuselage
- 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/DALA1031325523

## Discrepancy

DURING L-CHECK FOUND CORROSION ON R4 DOOR THRESHOLD SUPPORT FROM BS 1640 TO BS 1680.  REPAIRED PER SRM 51-40-02 PAGE 2-7.

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