# SDR SWAA2021081095314

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 2021
- Submitted: August 10, 2021
- Operation: Air carrier
- Aircraft: [N7723E](https://openairdocs.org/aircraft/N7723E), registered now
- Make and model: Boeing 737-76N
- Registry model: [Boeing 737-76N](https://openairdocs.org/model/boeing-737-76n) (OpenAirDocs)
- Aircraft serial: 32670
- Aircraft time: 48,099 hours, 24,239 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Condition: Corroded
- Location: Bs 902-907
- 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/SWAA2021081095314

## Discrepancy

CORROSION ON UNDERSIDE OF FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS902-BS907 RBL21 WL 170 ; / [01] REMOVED CORROSION AT FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS 902-BS 907 RBL 21 WL 170 MAX MATERIAL LOSS L=2.5';W=1.2';D=0.007' FOUND TO BE WITHIN LIMITS IAW SRM 53-00-53-1A-2 STEP 4A(2)(A) FIG 103 AND DWG 147A7501-18 TOOL USED ID:ATS1672 S/N:65092939 DUE 03/2022; [02] CORRECTION: FOUND TO BE OUT OF LIMITS; [03] VERIFIED CORROSION REMOVAL; EVALUATED; AND FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2.; [04] LOCATED AND DRILLED NEW FLOOR TO SIDEWALL AT BS 887-947; RBL 21; WL 170; IAW 737-700 SRM 51-40-05-OG-0 DWG 146A7501; [05] INSPECTED ACTION 4 LOCATED AND DRILLED NEW FLOOR TO SIDEWALL AT BS 887-947; RBL 21; WL 170; IAW 737-700 SRM 51-40-05-OG-0 DWG 146A7501; [06] APPLIED CHEMICAL CONVERCION COATING AND PRIMER ON FLOOR TO SIDEWALL BS 887-947; RBL 21; WL 169; IAW 737-700; AMM 51-21-72-370-804; AMM 51-21-41-370-802 OK TO INSTALL; [07] VERIFIED STEP 6; [08] OK TO INSTALL; [09] INSTALLED FLOOR TO SIDEWALL SUPPORT AT BS 887-947; RBL 21; WL 170; IAW 737-700 SRM 51-40-02 AND DWG 146A7500; [10] VERIFIED INSTALL OF FLOOR TO SIDEWALL SUPPORT PER SRM AND DWG.

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