# SDR SWAA2021122047019

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 23, 2021
- Submitted: December 20, 2021
- Operation: Air carrier
- Aircraft: N409WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 27896
- Aircraft time: 67,505 hours, 40,058 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- Condition: Corroded
- Location: Fuselage
- Stage of operation: UK
- 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/SWAA2021122047019

## Discrepancy

AFT OF FWD CARGO COMP. STRINGER 23 R/H AT BULKHEAD STA 540 IS CORRODED ; / [01] REMOVED FASTENERS FROM STRINGER 26L AND STA 540 PER B737-700 SRM 51-40-02-0G-0; EVALUATED CORRODED AREA AND FOUND OUT OF LIMITS PER B737-700 SRM 53-00-03-1A-1 FIG 103; ORIGINAL MATERIAL .045'; MATERIAL LOSS .045'; REMAINING MATERIAL .000'.[30] STARTING REPAIR PARTS INSTALLATION AS PER REF B737-700 SRM 53-00-03-2R-1 AND EA 21-153-03629-WIP1; [31] OK TO INSTALL CLIP AND SHEAR TIES REMOVED ON STEP 2.; [32] INSTALLED REPAIR PARTS AT FWD CARGO R/H SIDE STR 23R STA 500D-540 AS REF. B737-700 SRM 53-00-03-2R-1 AND EA 21-153-03629 WIP1; [33] INSTALLED SHEAR TIES AND CLIP AT FWD CARGO R/H STA 520 IAW SRM 51-40-02-0G-0.

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