# SDR SWAA2021092220845

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 18, 2021
- Submitted: September 22, 2021
- Operation: Air carrier
- Aircraft: N793SA
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 27888
- Aircraft time: 67,300 hours, 39,722 cycles
- System (JASC): [5511 · Horizontal Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5511)
- Part: Rib
- Condition: Cracked
- Location: Horizontal Stab
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2021092220845

## Discrepancy

LHS # 5 RIB SUSPECT CRACK AT STIFFENER #3 LWR AREA.  PERFORMED HFEC INSPECTION ON RIB AREA IAW NDT PART 6 51-00-00 PROC. 23.  CRACK CONFIRMED. PERFORMED HFEC AT CUTOUT IAW NDTM PART 651-00-00 PROCEDURE 23. NO CRACKS. INSPECTED. AREA PER 55-10-09-2R-4 4E NO DEFECTS. LOCATED AND DRILLED REPAIR IAW SRM 55-10-09-2R-4, REPAIR 4.  APPLIED ALODINE AND PRIMER IAW SRM 51-20-01-0G-0.  INSTALLED REPAIR IAW SRM 55-10-09-2R-4 REPAIR 4.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.