# SDR SWAA2021122048831

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 30, 2021
- Submitted: December 20, 2021
- Operation: Air carrier
- Aircraft: N409WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 27896
- Aircraft time: 67,505 hours, 40,058 cycles
- System (JASC): [5730 · Wing, Plate/Skin](https://openairdocs.org/jasc/5730)
- Part: Skin
- Condition: Cracked
- Location: L/H Wing
- Stage of operation: UK
- 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/SWAA2021122048831

## Discrepancy

CRACK FOUND AT LW #4 SLAT SKIN AT ACTUATOR FITTING ATTACHMENT 3RD 0/B AFT RIVET. CRACK LENGTH 0.0394' AT 1 O'CLOCK POSITION. ; CRACK FOUND AT LW #4 SLAT SKIN AT ACTUATOR FITTING ATTACHMENT 3RD 0B AFT RIVET. CRACK LENGTH 0.0394' AT 1 O'CLOCK POSITION.  REMOVED ACCESS PANELS 522CB; 522DB AND 522EB AT SLAT #4 FOR ACCESS IAW AMM 27-81-41-000-801.  INSTALLED REPAIR PARTS IAW SRM 57-42-01-2R-8 & SRM 51-40-02-0G-0.  APPLIED FILLET SEAL AT REPAIR DOUBLER IAW AMM 51-31-00-390-804.  INSTALLED FLEX SKIN AND ACCESS PANELS IAW SRM 51-40-02-0G-0.

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