# SDR SWAA2021040658183

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 23, 2021
- Submitted: April 6, 2021
- Operation: Air carrier
- Aircraft: [N452WN](https://openairdocs.org/aircraft/N452WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29846
- Aircraft time: 57,934 hours, 34,441 cycles
- System (JASC): [5312 · Fuselage Main, Bulkhead](https://openairdocs.org/jasc/5312)
- Part: Attach Angle
- Condition: Cracked
- Location: Bulkhead
- 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/SWAA2021040658183

## Discrepancy

EVIDENCE OF CRACK FOUND AT CENTER WING BOX STA 663 RBL 8.5. CTR WING LWR EXT SURFACE. / REPAIRED CENTER WING LOWER EXTERNAL SURFACE VAPOR BARRIER ATTACH ANGLE AT STA 663 RBL 8.5 IAW SRM 57-10-10-2R-5. ACCOMPLISHED LEAK CHECK IAW AMM 28-11-00-400-801. LEAK CHECK GOOD.

---
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.