# SDR SWAA2021110129978

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 14, 2021
- Submitted: November 1, 2021
- Operation: Air carrier
- Aircraft: [N901WN](https://openairdocs.org/aircraft/N901WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32545
- Aircraft time: 46,086 hours, 26,832 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: None
- Condition: Corroded
- Location: Fuselage
- 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/SWAA2021110129978

## Discrepancy

FLT DECK; STA 259.5 TO 270; WL 207; FLOOR SUPPORT STRUCTURE HAS MULTIPLE AREAS OF CORROSION; MARKED. ; / [01] REMOVED CORROSION FROM FLOOR STRUCTURE IAW SRM 51-10-02-0G-0. VERIFIED WITH 10X MAGNIFICATION.; [02] VERIFIED LIMITS FOR CENTER SUPPORT CHANNEL; ORIGINAL THICKNESS .040' LOSS .006' REMAINING .034' OUT OF LIMITS IAW SRM 53-10-51-1A-1 FIGURE 105 DETAIL C.; [03] VERIFIED LIMITS FOR LATERAL FLOOR BEAM AT STA 270; ORIGINAL THICKNESS .050' LOSS .010' REMAINING .040' OUT OF LIMITS IAW SRM 53-10-51-1A-1 FIGURE 105 DETAIL C. <BR>TOOL# AAR-32351 CAL DUE 01/12/22; [04] VERIFIED STEPS 1 THRU 3; [05] REPAIR ACCOMPLISHED ON W/O TTG8Q006Z8ZD AND TTG8Q006ZAA9 IAW EA 21-153-03144-WIP1 AND EA 21-153-03144-WIP2.

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