# SDR SWAA2022093065347 - Type: Service difficulty report (as reported; unverified) - Difficulty date: August 18, 2022 - Submitted: September 30, 2022 - Operation: Air carrier - Aircraft: [N431WN](https://openairdocs.org/aircraft/N431WN), registered now - Make and model: Boeing 737-7H4 - Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs) - Aircraft serial: 29845 - Aircraft time: 66,939 hours, 39,408 cycles - System (JASC): [5510 ยท Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510) - Part: None - Condition: Cracked - Location: Rh Hor Stab - 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/SWAA2022093065347 ## Discrepancy LEADING EDGE PANEL RIB ASSY. #2; CRACK NOTED AT RIVET HOLE (DOT 223-HLE002). / [01] REMOVED RIB ASSY #2 AT LEADING EDGE PANEL AS PER B737-700 SRM 51-40-02-0G-0.;[02] LOCATED AND DRILLED NEW RIB #2 POSITION AT LEADING EDGE R/H HORIZONTAL STABILIZER IN IAW SRM 51-40-02-0G-0 AND DWG# 186A1001;[03] VERIFIED STEPS #1 AND #2; LOCATED AND DRILLED.
OK TO TREAT AND PRIME DRILLED HOLES.;[04] TREATED WITH ALODINE AND PRIMER ALL FASTENERS HOLES OF NEW RIB IN IAW SRM 51-20-01-0G-0 AND 51-21-72-0G-0;[05] VERIFIED STEP #4.;[06] (RII) OK TO INSTALL NEW REPLACEMENT RIB ASSY.;[07] MIXED BMS 5-95 SEALANT AT 1:00 PM; 9/6/22 SQUEEZE OUT TIME BY 3:00 PM;[08] INSTALLED NEW RIB ASSY # 2 AT LEADING EDGE R/H HORIZONTAL STABILIZER IN IAW SRM 51-40-02-0G-0 AND DWG# 186A1001;[09] REMOVED AND REPLACED NEW RIB ASSY # 2 AT LEADING EDGE R/H HORIZONTAL STABILIZER IN IAW SRM 51-40-02-0G-0 AND DWG #186A1001;[10] VERIFIED STEPS #7 AND #8.;[11] (RII) FINAL INSPECTION; REPLACED WITH NEW RIB ASSY. WORK PERFORMED. --- 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.