# SDR SWAA2024061485218

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 13, 2024
- Submitted: June 14, 2024
- Operation: Air carrier
- Aircraft: [N929WN](https://openairdocs.org/aircraft/N929WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36631
- Aircraft time: 52,102 hours, 31,708 cycles
- System (JASC): [5510 · Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510)
- Part: Stiffener
- Part number: UNKNOWN
- Condition: Cracked
- Location: Horizontal 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/SWAA2024061485218

## Discrepancy

RH HORIZONTAL STABILIZER RIB #4 STIFFENER #3 LOWER SECTION CRACK<[01] SUMMARY<BR>REMOVED DAMAGE AT RIB #4 STIFFENER #3 AS PER B-737 SRM 55-10-09-2R-4.<BR>REMOVED CRACK ON #3 STIFFINER; AREA MARKED AS PER B-737 SRM 55-10-09-2R-4.<BR>LOCATED AND DRILLED REPAIR PARTS AS PER B-737 SRM 55-10-09-2R-4<BR> & PERFORMED ROUGHNESS TEST ON REPAIR PARTS FOUND THEM TO BE SMOOTHER THAN 125 MICROINCHES RA & PERFORMED ROUGHNESS TEST ON INITIAL PARTS FOUND THEM TO BE SMOOTHER THAN 36 MICROINCHES RA AS PER B-737 SRM 51-20-13-0G-0<BR>TOOL USED: BC 172331. NO CALIBRATION DUE DATE<BR>TREATED AND PRIME REPAIR PARTS AND INITIAL PARTS AS PER B-737 AMM 51-21-41-370-803 & AMM 51-21-72-370-801.<BR>ACCOMPLISH INSTALLATION OF RIB #4 STIFFENER #3 REPAIR AS PER B-737 SRM<BR>55-10-09-2R-4 & SRM 51-40-02<BR>ACCOMPLISH SEALANT FINISH AS PER B-737 SRM 51-20-05-0G & AMM 51-20-99/701;[02] VERIFIED STEP 1.

---
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.