# SDR SWAA2021081590287

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 4, 2020
- Submitted: August 16, 2021
- Operation: Air carrier
- Aircraft: [N476WN](https://openairdocs.org/aircraft/N476WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32475
- Aircraft time: 55,307 hours, 32,813 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Shield
- 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/SWAA2021081590287

## Discrepancy

***CORROSION*** ON FWD SHIELD AT FCB BS420 - BS440 R BL23 WL157. / CORROSION ON FCB FWD SHIELD BS420-440 RBL-23 WL157 FOUND TO BE OUT OF LIMIT DUE TO NO LIMIT ON SRM PARTS REPAIRED BY REPLACMENT IAW SRM 51-10-02-0G-0 PAR-9C LOCATED AND DRILLED NEW SHIELD ITEM# 7530143 IAW SRM 51-40-05-0G-0 AND DWG# 143A8126 REV-A AND INSTALLED IAW SRM 51-40-02-0G-0 AND DWG# 143A0080

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