# SDR SWAA2023070357465 - Type: Service difficulty report (as reported; unverified) - Difficulty date: June 9, 2023 - Submitted: July 3, 2023 - Operation: Air carrier - Aircraft: [N942WN](https://openairdocs.org/aircraft/N942WN), registered now - Make and model: Boeing 737-7H4 - Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs) - Aircraft serial: 36648 - Aircraft time: 45,425 hours, 27,767 cycles - System (JASC): [5512 ยท Horizontal Stabilizer, Plate/Skin](https://openairdocs.org/jasc/5512) - Part: Skin - 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/SWAA2023070357465 ## Discrepancy CRACK FOUND AT LEFT HORIZONTAL STABILIZER LOWER SKIN AT STAB STA 193.90; 17' FROM FRONT SPAR ;I/B ROW. CRACK LENGTH: 1.468' CRACK FOUND AT LEFT HORIONTAL STABILIER LOWER SKIN AT STAB STA 193.90 17" FROM FRONT SPAR I/B ROW. CRACK LENGTH: 1.468"<[01] INSTALLED REPAIR AT LH HORIZONTAL STAB. LOWER SKIN STA 293.90; PER SRM 55-10-01-2R-11 AND SRM 51-40-02-0G--0;;[02] CORRECTION STEP 1; INSTALLED REPAIR AT LH HORIZONTAL STAB. LOWER SKIN STA 293.90; PER SRM 55-10-01-2R-11 AND SRM 51-40-02-0G-0; AND FINISH; PAINT TO BE DONE ON TTG8Q00LQ2KH;[03] RII....VERIFIED FINAL CORRECTIVE ACTION.;[04] CORRECTION STEPS 1 AND 2;INSTALLED REPAIR AT LH HORIZONTAL STAB. LOWER SKIN STA 293.90; PER SRM 55-10-01-2R-11 AND SRM 51-40-02-0G-0; AND FINISH; PAINT TO BE DONE ON TTG8Q00LQ2KH; THIS IS CATEGORY B REPAIR; INSPECTION TRESHOLD AT 56.000 TOTAL FLIGHT CYCLES AND INTERVAL DETAIL VISUAL INSPECTION AT 9.000 FLIGHT CYCLES;[05] RII....VERIFIED FINAL CORRECTIVE ACTION STEP 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.