# SDR CALA2025100609628

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2025
- Submitted: October 6, 2025
- Operation: Air carrier
- Aircraft: [N33284](https://openairdocs.org/aircraft/N33284), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31635
- Aircraft time: 66,203 hours, 24,624 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- Part number: 143A78116
- 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/CALA2025100609628

## Discrepancy

CORROSION AT FWD CARGO AFT (AIR CONDITIONING DISTRIBUTION BAY) STR 28 RIGHT STA 537.DOT251-084. (REF AAR N/R 99951025) ESFR TRANSACTION COMPLETE PERFORMED  REPAIR TO THE RIGHT-HAND KEEL BEAM UPPER INNER CHORD IN ACCORDANCE WITH AAR-MIA ESR-WI NO.: 2023803-28-12809, WHICH IS INCLUDED ON PAGES 2 THROUGH 7 OF THIS ECRA#5330-07612 WORK ACCOMPLISHED BY V894498 INSP-250 ESFR NO.:1845 DONE BY:U348570

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