# SDR CALA2025120811833

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 24, 2025
- Submitted: December 8, 2025
- Operation: Air carrier
- Aircraft: [N23721](https://openairdocs.org/aircraft/N23721), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28940
- Aircraft time: 82,965 hours, 30,635 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- Part number: BAC1498156
- Condition: Corroded
- Location: Zone 100
- 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/CALA2025120811833

## Discrepancy

STRINGER 26L HAS CORROSION BETWEEN BS 360 AND 380.  REMOVED DAMAGED SECTION OF STR 26L IAW SRM 53-00-03-2R-1 STEP 4 A&B.  HFEC REQUIRED AT CUT EDGE OF DMG REMOVAL IAW SRM 53-00-03-2R-1 STEP 4C.  PERFORMED HFEC INSPECTION OF CUT EDGE OF STRINGER IAW NDT MANUAL PART 6, 51-00-00 PROC 23, NO DEFECTS NOTED IAW SRM 53-00-03-2R-1.  FABRICATED, LOCATED, DRILLED, TREATED, & PRIMED ALL REPAIR PARTS IAW SRM 53-00-03-2R-1.  INSTALLED STRINGER SPLICE REPAIR, REPLACEMENT STRINGER SECTION, AND PRODUCTION SPLICE IAW SRM 53-00-03-2R-1.

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