# SDR SWAA2022042084211

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2022
- Submitted: April 20, 2022
- Operation: Air carrier
- Aircraft: [N472WN](https://openairdocs.org/aircraft/N472WN), registered now
- Make and model: Boeing 737*
- Aircraft serial: 33831
- Aircraft time: 58,559 hours, 34,804 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Beam
- Condition: Corroded
- Location: Fuselage
- 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/SWAA2022042084211

## Discrepancy

CORROSION ON UPPER SURFACE OF B.S. 270 LATERAL BEAM AT L.B.L. 10 - R.B.L. 10; W.L 207.54. / [01] SRM 53-10-51-0I-2 FOR IDENTIFICATION AND SRM 53-10-51-1A-1 FOR ALLOWABLE DAMAGE ARE APPLICABLE;[02] REMOVED CORROSION AT DISCREPANCY AREA; L=20.' X W=.90' X D=0.020' ORIGINAL MATERIAL THICKNESS 0.050' MATERIAL REMAINING THICKNESS 0.030' FOUND TO BE OUT OF LIMITS PER SRM 53-10-51-1A-1 PARAGRAPH 4.C.(2) DETAIL C. TOOL ID:ATS1671; S/N:65093024;DATE:01/2022;DUE:10/2022;[03] VERIFIED CORRECTIVE ACTION ITEMS 1-2; MATERIAL LOSS OUT OF LIMITS PER SRM 53-10-51-1A-1.;[04] ACCOMPLISHED REPAIR ON M-21-153-00277;[05] VERIFIED CORRECTIVE ACTION 4.;[06] UPDATED CORROSION LEVEL;[07] VERIFIED TASK COMPLETE.

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