# SDR SWAA2024052275422

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 16, 2024
- Submitted: May 22, 2024
- Operation: Air carrier
- Aircraft: [N474WN](https://openairdocs.org/aircraft/N474WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33861
- Aircraft time: 65,342 hours, 39,098 cycles
- System (JASC): [5311 · Fuselage Main, Frame](https://openairdocs.org/jasc/5311)
- Part: Frame Angle
- Part number: UNKNOWN
- Condition: Corroded
- Location: Bs 727d Lbl26-33
- 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/SWAA2024052275422

## Discrepancy

CORROSION ON STA 727D FRAME INNER CHORD AT LBL 26 AND 33; WL 159.<[01] UPON FURTHER INVESTIGATION; CORROSION FOUND TO BE LOCATED ON SIDEWALL LINING SUPPORT ANGLE AND NOT THE FRAME INNER CHORD.;[02] REMOVED AND REPLACED CHANNEL (SIDEWALL LINING SUPPORT) AT STA 727D BETWEEN STR-19L TO STR-25LPER SRM 51-40-02-0G-0 AND BOEING DWG 146A1220.;[03] VERIFIED.

---
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.