# SDR SWAA2022050387409

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 24, 2022
- Submitted: May 3, 2022
- Operation: Air carrier
- Aircraft: [N424WN](https://openairdocs.org/aircraft/N424WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29828
- Aircraft time: 66,349 hours, 39,132 cycles
- System (JASC): [5514 · Horizontal Stabilizer Miscellaneous Structure](https://openairdocs.org/jasc/5514)
- Part: Angle
- Condition: Cracked
- 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/SWAA2022050387409

## Discrepancy

VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE SPRING ANGLE; AT LOWER EDGE CRACKS NOTED ON TWO AREAS. / REMOVED DAMAGE SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 51-40-02-0G-0.;[03] VERIFIED STEPS #1 AND #2.;[04] LOCATED AND DRILLED NEW SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 SRM 51-40-05-0G-0.;[05] VERIFIED STEP #4.;[06] OK TO TREAT AND PRIME DRILLED HOLES.;[07] TREATED AND PRIMED DRILLED HOLES AT NEW SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 SRM 51-20-01-0G-0.;[08] OK TO INSTALL NEW REPLACEMENT SPRING ANGLE.;[09] PARTIAL INSTALLED NEW SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 SRM 51-40-02-0G-0 AND DWG # 176A3101.;[10] (RII) VERIFIED PARTIAL SPRING ANGLE INSTALLATION STEP #9.;[11] INSTALLED NEW SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 SRM 51-40-02-0G-0 AND DWG # 176A3101.;[12] REMOVED EWIS PROTECTION AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 AMM 20-60-07-913-801.;[13] (RII) VERIFIED STEP #1; SPRING ANGLE INSTALLED.;[14] VERIFIED STEP #12.;[15] CHANGE INFORMATION ENTER IN ERROR IN STEP #13.<BR> (RII) VERIFIED STEP #11; SPRING ANGLE INSTALLED.;REMOVED AND REPLACED SPRING ANGLE AT VERTICAL FIN FRONT SPAR FITTING FIX LEADING EDGE IAW B737-700 SRM 51-40-02-0G-0 AND DWG # 176A3101.

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