# SDR SWAA2021042664338

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 3, 2021
- Submitted: April 26, 2021
- Operation: Air carrier
- Aircraft: [N221WN](https://openairdocs.org/aircraft/N221WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 34259
- Aircraft time: 53,548 hours, 31,478 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- Condition: Cracked
- Location: Fwd Cargo
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2021042664338

## Discrepancy

CRACK STRINGER 26R AT BS 540 FWD CARGO COMPARTMENT. EVALUATED ALLOWABLE DAMAGE LIMITS OF STR-26R AND FOUND OUT OF LIMITS DUE TO CRACK IS NOT PERMITTED FABRICATE REPAIR PARTS OF MATERIAL ALUMINUM SHEET PN 70750.045' PO: 2021 113097 AND PN 7075 TO 0.050' PO 2021 121145 HEAT TREATED AND CONVERTED FROM TO TO CONDITION T6 AND PERFORMED PERMANENT REPAIR ON STR26R LOC BS540 TO BS500D +100' IAW B737700 SRM 5300032R1 REPAIR 1

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