# SDR SWAA2020040629792

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 4, 2020
- Submitted: April 6, 2020
- Operation: Air carrier
- Aircraft: N918WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29843
- Aircraft time: 41,374 hours, 24,603 cycles
- System (JASC): [5514 · Horizontal Stabilizer Miscellaneous Structure](https://openairdocs.org/jasc/5514)
- Part: Stiffener
- 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/SWAA2020040629792

## Discrepancy

L/H HORI. STAB.; STAB STA 120.4 RIB; CRACK IN RIB STIFFENER AT 3RD STIFFENER RIB FROM FRONT 1.0' UP FROM LOWER ATTACH FLANGE / TRIMMED OUT DAMAGED AREA OF STAB RIB AT LH STAB STA 120.4 3RD STIFFENER FROM FRONT AND FABRICATED AND INSTALLED RIB STIFFENER REPAIR IAW SRM 55-10-09-2R-4. RESTORED CIC TO DISTURBED AREA IAW AMM 51-21-91-620-802

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