# SDR DALA1123165521

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 30, 2011
- Submitted: March 31, 2011
- Operation: Air carrier
- Aircraft: N521US
- Make and model: Boeing 757251
- Aircraft serial: 23209
- Aircraft time: 77,302 hours, 32,235 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Stiffener
- 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/DALA1123165521

## Discrepancy

VERTICAL STIFFENER AT FRAME BS 1440 BETWEEN STR 27R AND 28R CORRODED NEAR AFT DOOR SILL.  REMOVED & INSTALLED NEW CLIP, FABRICATED IAW STAM TRAVELER #T11/876864.  P/N 146N5393-28 IAW SRM 51-40-02.

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