# SDR SWAA2021062370068

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 5, 2021
- Submitted: June 23, 2021
- Operation: Air carrier
- Aircraft: [N938WN](https://openairdocs.org/aircraft/N938WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36645
- Aircraft time: 39,916 hours, 24,221 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Floor Support
- Condition: Corroded
- Location: Bs 261-269
- 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/SWAA2021062370068

## Discrepancy

***CORROSION*** FLIGHT DECK FLOOR INTERCOSTAL HAS AREAS OF CORROSION; BS 261 - 269; LBL 11; WL 207.5 / REMOVED CORROSION ON FLIGHT DECK FLOOR INTERCOSTAL AT B.S 261-269 LBL 11 WL 207.5; BLEND MEASURED 1' X 0.5' X 0.013'; FOUND TO BE OUT OF LIMITS PER SRM 53-10-51-1A-1; REMOVED AND REPLACED WITH NEW INTERCOSTAL PER SRM 51-40-02 DWG 141A5210 SH 19 AND DWG 140A9810 SH 19 AND DWG 141A5600 SH 2.

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