# SDR SWAA2023062048234

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 12, 2023
- Submitted: June 20, 2023
- Operation: Air carrier
- Aircraft: [N429WN](https://openairdocs.org/aircraft/N429WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33658
- Aircraft time: 66,602 hours, 39,316 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Floor Support
- Part number: UNKNOWN
- 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/SWAA2023062048234

## Discrepancy

FORWARD CARGO COMPARTMENT - MULTIPLE AREA OF CORROSION ON MIDDLE FLOOR SUPPORT BS 500C+18.25 RBL 14; RBL 20. (MARKED)<[01] REMOVED CORROSION ON MIDDLE FLOOR SUPPORT BS 500C+18.25 RBL 14; RBL 20. PER REF SRM 53-30-08-1A-1 L=1;W=1<BR><BR>BLEND OUT EVALUATION ORIGINAL MATERIAL IS .071'' REMAINING THICKNESS IS .040'' .THEREFORE FOUND TO BE OUT OF LIMITS PER REF SRM 53-30-08-1A-1;[02] RECEIVED NEW ON FORWARD CARGO COMPARTMENT MIDDLE FLOOR SUPPORT BS 500C+18.25 RBL 23 TO LBL 23 P/N 143A9485-35 PO#920984. LOCATED AND DRILLED IAW SRM51-40-05 AND DWG143A9481;[03] SRM 53-30-08-0I-1 IDENTIFICATION AND SRM 53-30-08-1A-1 ALLOWABLE DAMAGE ARE APPLICABLE;[04] VERIFIED CORRECTIVE ACTION 1; 2 AND 3 AS WELL AS VERIFIED THE MEASUREMENT TABLE.

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