# SDR SWAA2020032442657

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2020
- Submitted: March 24, 2020
- Operation: Air carrier
- Aircraft: [N552WN](https://openairdocs.org/aircraft/N552WN), registered now
- Make and model: Boeing 737-7BX
- Registry model: [Boeing 737-7BX](https://openairdocs.org/model/boeing-737-7bx) (OpenAirDocs)
- Aircraft serial: 30744
- Aircraft time: 59,169 hours, 33,658 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Part number: 143A7501
- Condition: Corroded
- Location: Fuselage
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2020032442657

## Discrepancy

***CORROSION***  ON FORWARD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT B.S. 400-500D, L.B.L. 22, W.L. 155.         SIDE PLATE CHANNEL FOUND IT OUT OF LIMITS IAW SRM 53-00-53 IN MULTIPLES AREAS 1 X 1 OVER 50% MATERIAL LOSS. FABRICATED FLOOR TO SIDEWALL SUPPORT AT BS 400-500D LBL 22 FROM BAC 1496-444 #7075 T62 LOT # 1426040-1 LOCATED AND DRILLED IAW DWG 143A7501 REV B AND FABRICATED ZEE CHANNEL SPLICE BS 490 LBL 22 FROM BAC 1496-444 # 7075 T62 CLAD LOT # 1426040-1 LOCATED AND DRILLED IAW SRM 53-00-53-2R-6 REPAIR 6. APPLI

---
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.