# SDR SWAA2023110607173

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 3, 2023
- Submitted: November 6, 2023
- Operation: Air carrier
- Aircraft: [N908WN](https://openairdocs.org/aircraft/N908WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36620
- Aircraft time: 51,548 hours, 31,049 cycles
- System (JASC): [5510 · Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510)
- Part: Stiffener
- Part number: UNKNOWN
- Condition: Cracked
- Location: Zn 300 Stabilize
- 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/SWAA2023110607173

## Discrepancy

RH HORIZONTAL STABILIZER RIB 5 (STAB STA. 129.50); 3RD STIFFENER FROM FRONT SPAR; BOTTOM AREA WITH A CRACK.<[01] NDI REQUEST TO VERIFY CRACK AT DISCREPANCY AREA.;[02] HFEC INSPECTED SUSPECTED CRACK AREA IAW 737 NDTM PART 6; 51-00-00 PROCEDURE 23.<BR>CRACK NOTED AT DISCREPANCY AREA.<BR>EQUIP USED:<BR>-NORTEC 500D ID: IS000680 CAL DUE: 05/2024;[03] REMOVED THE DAMAGED PART AT RH HORIZONTAL STABILIZER STA 129.50 RIB 3RD VERTICAL STIFFENER AND INSTALLED REPAIR PARTS IAW SRM 55-10-09-2R-4;[04] VERIFIED CORRECTIVE ACTION ITEM 3.

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