# SDR CALA2026100520088

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 2, 2026
- Submitted: October 5, 2026
- Operation: Air carrier
- Aircraft: [N24212](https://openairdocs.org/aircraft/N24212), registered now
- Make and model: Boeing 737824
- Aircraft serial: 28772
- Aircraft time: 82,239 hours, 30,837 cycles
- System (JASC): [5713 · Wing, Longeron/Stringer](https://openairdocs.org/jasc/5713)
- Part: Stringer
- Part number: 112A3001203
- Condition: Corroded
- Location: Zone 500
- 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/CALA2026100520088

## Discrepancy

LEFT WING UPPER SKIN INTERIOR LOWER SURFACE AT RIB 19 STR 9 HAD A POSSIBLE CRACK.   REPAIRED STR 9 AT RIB 19 IAW EO 5720-23033 REV A-F AND ECRA 5720-03359 .   LT WING UPPER SKIN INTERIOR LOWER SURFACE AT RIB 19, STR 9 REPAIRED IAW EC/RA 5720-03359.

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