# SDR SWAA2020071497304

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 2, 2020
- Submitted: July 14, 2020
- Operation: Air carrier
- Aircraft: [N478WN](https://openairdocs.org/aircraft/N478WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33989
- Aircraft time: 55,249 hours, 32,699 cycles
- System (JASC): [5511 · Horizontal Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5511)
- Part: Rib
- Condition: Cracked
- Location: Lt Horiz 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/SWAA2020071497304

## Discrepancy

LEFT HORIZONTAL STAB STA 120.30; INSPAR RIB ASSY 4 IS CRACKED AT FWD LOWER WEB AREA.  ACCOMPLISHED REPAIR AT LEFT HORIZONTAL STAB STA 12.30; INSPAR RIB ASSY 4 AT FWD LOWER WEB AREA IAW RES 2016044-5 REV IR AND EA 20-155-00991 REV IR REF NRC W156198 AND EA 20-155-00989.

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