# SDR SWAA2021090300885
- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 1, 2021
- Submitted: September 3, 2021
- Operation: Air carrier
- Aircraft: N7839A
- Make and model: Boeing 737-73V
- Registry model: [Boeing 737-73V](https://openairdocs.org/model/boeing-737-73v) (OpenAirDocs)
- Aircraft serial: 30243
- Aircraft time: 57,802 hours, 35,522 cycles
- System (JASC): [5320 ยท Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Condition: Corroded
- Location: Fwd Cargo
- 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/SWAA2021090300885
## Discrepancy
CORROSION ON R/H FLOOR-TO-SIDEWALL SUPPORT; BS 500C+10; RBL 24; WL 156 (MARKED) ; / REMOVED CORRISION FROM FCB FWD R/H FLOOR-TO-SIDEWALL SUPPORT; BS 500C+10; RBL 24; WL 156. P/N 143A7501-4; IN AREA 0.8' X 0.6' X 0.019' DEEP; ORIGINAL THICKNESS 0.04' FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PER 4.A(2) FIG. 103 DETAIL A
TOOL USED
-DEPTH GAGE
ID:ATS2472. S/N: UNKNOWN. DUE DATE: 06/2022; [03] VERIFIED REMOVED CORRISION FROM FCB FWD R/H FLOOR-TO-SIDEWALL SUPPORT; BS 500C+10; RBL 24; WL 156. P/N 143A7501-4; IN AREA 0.8' X 0.6' X 0.019' DEEP; ORIGINAL THICKNESS 0.04' FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PER 4.A(2) FIG. 103 DETAIL A.; [04] FABRICATED NEW R/H FLOOR TO SIDEWALL SUPPORT; BS 500C+10; RBL 24; WL 156 USING BAC1496-444 7075 T62 EXTRUSION LOT NO: 1457271-1 PER BOEING DRAWING 143A7501.; [05] LOCATED AND DRILLED NEW R/H FLOOR TO SIDEWALL SUPPORT; BS 500C+10; RBL 24; WL 156 PER BOEING DRAWING 143A7500 AND SRM 51-40-05-OG-0; [06] OK TO APPLY CHEMICAL CONV. AND PRIMERINSTALLED NEW R/H FLOOR TO SIDEWALL SUPPORT; BS 500C+10; RBL 24; WL 156 PER SRM 51-40-02-0G-0 AND BOEING DWG: 143A7500
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