# SDR SWAA2021081992456

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2021
- Submitted: August 19, 2021
- Operation: Air carrier
- Aircraft: [N941WN](https://openairdocs.org/aircraft/N941WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36647
- Aircraft time: 39,425 hours, 23,903 cycles
- System (JASC): [5530 · Vertical Stabilizer](https://openairdocs.org/jasc/5530)
- Part: Seal
- Condition: Cracked
- Location: Vertical Stab
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2021081992456

## Discrepancy

A22-78; VERTICAL STAB STA 1018; LBL & RBL10'; JUST ABOVE FWD SPAR ATTACH LUGS; WEB STIFFNER CRACKED @ LEFT & RIGHT SIDES @ STRAIN RELIEF CUTOUTS; MRK'D. ; / [01] REMOVED EXPANSION JOINT ASSY. IAW SRM 51-40-02-0G-0; [02] VERIFIED NEW SPRING SEAL AS P/N 176A3101-26 ATAG BF3645 IAW IPC 55-33-11-02A; DWG 176A3101 REV -. LOCATED AND DRILLED NEW SEAL IAW SRM 51-40-05-0G-0 DWG 176A3101 REV -.; [03] C/W STEP 2<BR>OK TO INSTALL; [04] INSTALLED NEW SPRING SEAL ASSEMBLY IAW SRM 51-40-02-0G-0; DWG 176A3101 REV -.; [05] REMOVED AND REPLACED VERT. STAB STA 1018 SPRING SEAL P/N176A3101-26 IAW SRM 51-40-02-0G-0; DWG 176A3101 REV -.; [06] VERIFIED STEPS 4 AND 5<BR>AUDIT C/W

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