# SDR SWAA2025020583005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 4, 2025
- Submitted: February 5, 2025
- Operation: Air carrier
- Aircraft: [N8611F](https://openairdocs.org/aircraft/N8611F), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 36892
- Aircraft time: 40,621 hours, 19,284 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Stiffener
- Condition: Cracked
- Location: Zone 100
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2025020583005

## Discrepancy

CRACK STIFFENER ASSY LOCATED BS540 BETWEEN BL 0 TO LBL 24.75 AT CENTER WING BOX 2024-779213<[01].  MEASURE OF CRACK THE DAMAGED PART IS L:0.120 INCHE TOOL USED ELECTRONIC CALIPER P/N:500-196-30; SN:A23352980; DUE DATE:14-FEB-25. AND NOT FOUND ALLOWABLE DAMAGE ON SRM; REPLACED STIFFENER ASSY LOCATED BS540 BETWEEN BL 0 TO LBL 24.75 AT CENTER WING BOX IAW B737-800 SRM-51-40-02-0G-0; DWG 143A0060 SHEET 64 REV -; AND B737-800 SRM 51-10-02-0G PARAGRAPH 9.;[02] MEASURE OF CRACK THE DAMAGED PART IS L:0.120 INCHE TOOL USED ELECTRONIC CALIPER P/N:500-196-30; SN:A23352980; DUE DATE:14-FEB-25. AND NOT FOUND ALLOWABLE DAMAGE ON SRM; REPLACED STIFFENER ASSY LOCATED BS540 BETWEEN BL 0 TO LBL 24.75 AT CENTER WING BOX IAW B737-800 SRM-51-40-02-0G-0; DWG 143A0060 SHEET 64 REV -; AND B737-800 SRM 51-10-02-0G PARAGRAPH 9.

---
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.