# SDR SWIA2025073175151

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 31, 2025
- Submitted: February 3, 2026
- Operation: Air carrier
- Aircraft: [N821SK](https://openairdocs.org/aircraft/N821SK), registered now
- Make and model: Cndair CL6002D24
- Aircraft serial: 15109
- Aircraft time: 38,465 hours, 24,998 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- 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/SWIA2025073175151

## Discrepancy

CORROSION ON STGR23L BETWEEN FS1069.75- FS1088.20 AS MARKED   (C-CHECK RO 02/01/2026)REMOVED CORROSION ON STGR23L BETWEEN FS1069.75- FS1088.20 REF CRJ-900 SRM 51-21-06-001-001-A01NOMINAL THICKNESS IS: 0.100" REF. BOMBARDIER DWG MM670-35151 REV R MINIMUM REMAINING THICKNESS IS: 0.094" LOSS MATERIAL IS: 0.006".DAMAGE IS NOT ALLOWED IN THE STRINGER ATTACHED FLANGE THEREFORE IS OUT OF LIMITS REF. CRJ900 SRM 53-61-03-101-001-A02COMPLIED WITH REO 690-53-61-1655 REV -- DATED 2025-08-06SEE CONTINUE CARD FOR DETAILSPERFORMED PRESSURIZATION OF STGR23L BETWEEN FS1069.75- FS1088.20 REF CRJ900 AMM 21-31-00-910-801-A02.NO LEAKS NOTED AT THIS TIMECOMPLIED WITH SKYWEST TASK CARD 51-900-1002-SKY.

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