# SDR SWAA2020101317349

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 21, 2020
- Submitted: October 13, 2020
- Operation: Air carrier
- Aircraft: [N498WN](https://openairdocs.org/aircraft/N498WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32480
- Aircraft time: 54,229 hours, 32,111 cycles
- System (JASC): [5510 · Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510)
- Part: Stiffener
- 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/SWAA2020101317349

## Discrepancy

LEFT HORIZONTAL STAB INSPAR RIB ASSEMBLY STA 120.30; RIB 4; STIFFENER 3 HAS A CRACK AT LOWER AREA, MARKED 78-2.  REPAIRED STIFFENER NR 3, RIB 4 AT LT HORIZONTAL STAB STA 120.30, IN REF B737 SRM 55-10-09-2R-4.  NOTE: CRACK FOUND ON UPPER FWD OUTBOARD FLANGE.  FIRST FASTENER HOLES WILL BE ACCOMPLISHED ON NR W173760-3000/0023.

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