# SDR SWAA2023061449379

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 16, 2023
- Submitted: June 14, 2023
- Operation: Air carrier
- Aircraft: [N288WN](https://openairdocs.org/aircraft/N288WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36611
- Aircraft time: 51,345 hours, 30,884 cycles
- System (JASC): [5710 · Wing Main, Frame Structure](https://openairdocs.org/jasc/5710)
- Part: Stiffener
- 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/SWAA2023061449379

## Discrepancy

CRACK INDICATION OBTAINED FROM FASTENER HOLE ON VAPOR BARRIER STIFFENER AT LBL 51<[01] REAMED FASTENER HOLE ON VAPOR BARRIER STIFFENER AT LBL 51 TO 2ND OVERSIZE AS PER B737-700 SRM 51-40-02-0G-0 STEP 4 D.;[02] VOID STEP #1;[03] ACCOMPLISHED EA: 23-157-01649/8818001.;[04] VERIFIED STEP 3

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