# SDR SWAA2022101949317

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 29, 2022
- Submitted: October 19, 2022
- Operation: Air carrier
- Aircraft: N786SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29811
- Aircraft time: 70,923 hours, 41,833 cycles
- System (JASC): [5511 · Horizontal Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5511)
- Part: Rib
- 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/SWAA2022101949317

## Discrepancy

LEFT HORIZONTAL STABILIZER LEADING EDGE; INTERNAL #4 RIB CRACK NOTED AT RIVET EDGE HOLE (DOT-223 LHLE4). / [01] REMOVED #4 RIB AT L/H HORIZONTAL STAB L/E AS PER REF SRM 51-40-02-0G-0.;[02] LOCATED AND DRILLED #4 NEW RIB AT L/H HORIZONTAL STAB L/E AS PER REF SRM 51-40-05-0G-0.;[03] VALIDATED STEPS 1 & 2<BR><BR><BR>OK TO INSTALL NEW UNIT;[04] INSTALLED #4 RIB AT L/H HORIZONTAL STAB L/E AS PER REF SRM 51-40-02-0G-0.;[05] SUMMARY :REMOVED #4 RIB AT L/H HORIZONTAL STAB L/E AS PER REF SRM 51-40-02-0G-0.LOCATED AND DRILLED #4 NEW RIB AT L/H HORIZONTAL STAB L/E AS PER REF SRM 51-40-05-0G-0.INSTALLED #4 RIB AT L/H HORIZONTAL STAB L/E AS PER REF SRM 51-40-02-0G-0.;[06] [FINAL] VALIDATED STEPS 4 & 5

---
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.