# SDR CALA2025120811835

- 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: 141A353218
- 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/CALA2025120811835

## Discrepancy

STRINGER 25L HAS CORROSION BETWEEN BS 360 & 380.  CUT OUT DAMAGE FROM STR 25L IAW SRM 53-00-03-2R-1, STEP 4 A & B.   PERFORMED HFEC INSPECTION OF CUT EDGE OF STRINGER IAW NDT MANUAL PART 6, 51-00-00 PROC 23, NO DEFECTS NOTED.  FABRICATED, LOCATED, DRILLED, TREATED, & PRIMED ALL REPAIR PARTS FOR FACTORY SPLICE TO AFT SPLICE REPAIR IAW SRM 53-00-03-2R-1,   INSTALLED NEW STRINGER 25L SECTION AND BOTH FACTORY FWD AND AFT SPLICES IAW SRM 53-00-03-2R-1.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.