# SDR SWAA2021091500044

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 29, 2021
- Submitted: September 15, 2021
- Operation: Air carrier
- Aircraft: [N447WN](https://openairdocs.org/aircraft/N447WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33720
- Aircraft time: 58,733 hours, 34,620 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Part number: 146A75022
- Condition: Corroded
- Location: Aft Cargo Bay
- 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/SWAA2021091500044

## Discrepancy

CORROSION ON FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS727D+10 RBL21 WL156. ; / REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BS727D+10' RBL21 WL156 ;DIMENSION. L=2'X W=1.2' DEPTH:.010 IAW SRM 51-10-02.PARA#15;EVALUATED FLOOR TO SIDEWALL SUPPORT;0RIGINAL THICKNESS .040' REMAINING THICKNESS .030 DAMAGE EXCEED 10% ORIGINAL THICKNESS;FOUND TO BE OUT LIMITS IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2 LOCATED AND DRILLED SIDEPLATE BTW BS 727- BS767; RBL 21;WL 156. IAW SRM 51-40-05-0G-0 DWG# 146A7500;DWG#146A7502 INSTALLED SIDEPLATE BTW BS 727- BS767; RBL 21;WL 156. IAW SRM 51-40-02-0G-0 DWG# 146A7500;DWG#146A7502.; [12] VERIFIED INSTALLED SIDEPLATE BTW BS 727- BS767; RBL 21;WL 156. IAW SRM 51-40-02-0G-0 DWG# 146A7500;DWG#146A7502.

---
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.