# SDR SWAA2023062048225

- 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: Sidewall 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/SWAA2023062048225

## Discrepancy

CORROSION ON FLOOR TO SIDEWALL SUPPORT AT ACB BS767 - BS727A RBL21 WL158.<[01] VERIFY APPLICABILITY PER SRM 53-60-53-0I-2 AND SRM 53-00-53-1A-2<BR>REMOVED CORROSION ON DISCREPANCY AREA L=3.5'; W=1.7'; D=0.007'. FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 STEPS 4A(2)(A) FIG 103 TOOL USED ID:ATS2827 ; DUE:01/2024;[02] VERIFIED CORRECTIVE ACTION STEP 1.;[03] RECIVED NEW FLOOR TO SIDEWALL ITEM 146A7502-51 LOT 1519356/1 LOCATED AND DRILLED NEW FLOOR TO SIDEWALL AT BS 727 TO BS 767 WL 158; IAW 737-700 SRM 51-40-05-0G-0 DWG 146A7500.-;[04] VERIFIED CORRECTIVE ACTION 3;[05] VERIFIED MEASUREMENT TABLE;[06] UPDATE PART REQUIREMENT;[07] CARD COMPLETE

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