# SDR SWAA2023042823366

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 3, 2023
- Submitted: April 28, 2023
- Operation: Air carrier
- Aircraft: N412WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29818
- Aircraft time: 71,376 hours, 42,351 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: Stringer
- Condition: Cracked
- Location: Zn 100 Fus Lower
- 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/SWAA2023042823366

## Discrepancy

CRACKED STRINGER AT AREA AFT OF FCB BS535 S-27R WL150. MARKED<REMOVED DAMAGED SECTION OF S-27R BETWEEN BS 500D TO 540; PERFORMED DVI ON REPAIR AREA AND NO ADDITIONAL DAMAGE FOUND IAW SRM 53-00-03-2R-1 REP.1 PAR. 4 A-BRECEIVED STRINGER SECTION FROM OSS R.O # 913330-SWA IAW SRM 53-00-03-2R-1 REP.1 PAR.D;[08] VERIFIED CORRECTIVE ACTION STEP 7.;[09] RECEIVED STRINGER SPLICE HAT CHANNEL FROM OSS R.O # 913330-SWA IAW SRM 53-00-03-2R-1 REP.1 PAR.D;[10] VERIFIED CORRECTIVE ACTION #9;[11] LOCATED; DRILLED AND APPLIED CHEMICAL CONVERSION COATING ON REPAIR PARTS AND REPAIR AREA OF S-27R AND BETWEEN BS 500D TO 540 IAW SRM 53-00-03-2R-1 REP.1 PAR.D TO I.;APPLIED PRIMER ON REPAIR PARTS AND REPAIR AREA OF S-27R AND BETWEEN BS 500D TO 540 IAW SRM 53-00-03-2R-1 REP.1 PAR J. AND OK TO INSTALL OF REPAIR PARTS AND REMOVED PARTS FOR REPAIR;[14] VERIFIED CORRECTIVE ACTION ITEM 13.<BR>OKAY TO INSTALL REPAIR PARTS AND PARTS REMOVED TO FACILITATE REPAIR GIVEN.;[15] INSTALLED ALL REPAIR PARTS S-27R AND BETWEEN BS 500D TO 540 IAW SRM 53-00-03-2R-1 REP.1 PAR. K; DWG. 143A3210 AND 143A1215.;[16] COMPLETED STEP 1.;[17] VERIFIED CORRECTIVE ACTION 15 AND 16 COMPLETED STEP 1;[18] ALL STEP COMPLETE;[19] APPLIED CIC ON REPAIR AREA S-27R AND BETWEEN BS 500D TO 540 IAW SRM 53-00-03-2R-1 REP.1 PAR. L;[20] FINAL INSPECTION. JOB COMPLETE.<BR><BR>VERIFIED MEASUREMENTS TABLE.

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