# SDR SWAA2023041917137

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2023
- Submitted: April 19, 2023
- Operation: Air carrier
- Aircraft: [N8530W](https://openairdocs.org/aircraft/N8530W), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 63592
- Aircraft time: 19,862 hours, 9,651 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Zn 100 Fus Lower
- 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/SWAA2023041917137

## Discrepancy

PASSENGER CABIN FLOOR BEAM STRUCTURE HAS CORROSION IN AND AROUND NUT PLATE HOLE BS328 RBL 21.<[01] BLENDED CORROSION PER SRM 51-10-02. DAMAGE REMOVAL FOUND TO BE OUT OF LIMITS PER SRM 53-10-51-1A-1. DAMAGED PART P/N 141A5504-26 ORIGINAL THICKNESS = .125?; REMAINING THICKNESS AFTER INITIAL BLEND = .110?. CORROSION STILL REMAINING AROUND EDGE OF HOLE.;[02] VERIFIED DAMAGE IS OUT OF LIMITS .BLENDED CORROSION PER SRM 51-10-02. DAMAGE REMOVAL FOUND TO BE OUT OF LIMITS PER SRM 53-10-51-1A-1. DAMAGED PART P/N 141A5504-26 ORIGINAL THICKNESS = .125?; REMAINING THICKNESS AFTER INITIAL BLEND = .110?. CORROSION STILL REMAINING AROUND EDGE OF HOLE.;[03] ACCOMPLISHED ULTRA SOUND THICKNESS OF BLENDED AREA PER NDT PART 4 51-00-00 PROC. 3;[04] CORRECTION TO NDT REF. ACCOMPLISHED ULTRA SOUND THICKNESS OF BLENDED AREA PER NDT PART 4 51-00-00 PROC. 2;[05] UPDATED PARTS AND MEASUREMENTS INFORMATION.;[06] FLOORBEAM REPAIRED PER EA 23-153-00902.;[07] C/W INSPECTION.;[08] C/W INSPECTION.

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