# SDR SWAA2022050387614

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 24, 2022
- Submitted: May 3, 2022
- Operation: Air carrier
- Aircraft: [N424WN](https://openairdocs.org/aircraft/N424WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29828
- Aircraft time: 66,349 hours, 39,132 cycles
- System (JASC): [5510 · Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510)
- Part: Rib
- Condition: Cracked
- Location: Lh Hor 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/SWAA2022050387614

## Discrepancy

LEFT HORIZONTAL STABILIZER FRONT SPAR L/E FAIRING 331B CRACKED AT RIB 1 MKD DOT / [01] REMOVED CRACKED RIB #1 AT LEFT HORIZONTAL STABILIZER FRONT SPAR L/E FAIRING 331B IAW SRM 51-40-02-0G-0.;[02] LOCATED AND DRILLED NEW RIB #1 PO#1758677 AT LEFT HORIZONTAL STABILIZER FRONT SPAR L/E FAIRING 331B IAW SRM 51-40-05-0G-0.;[03] VERIFIED STEPS #1 AND #2.;[04] OK TO TREAT AND PRIME DRILLED HOLES.;[05] TREATED AND PRIMED DRILLED HOLES IAW SRM 51-20-01-0G-0.;[06] OK TO INSTALL NEW RIB.;[07] INSTALLED NEW RIB #1 AT LEFT HORIZONTAL STABILIZER FRONT SPAR L/E FAIRING 331B IAW SRM 51-40-02-0G-0.;[08] (FINAL) REMOVED; LOCATED/DRILLED; AND INSTALLED NEW RIB #1 AT LEFT HORIZONTAL STABILIZER FRONT SPAR L/E FAIRING 331B IAW SRM 51-40-02-0G-0 AND SRM 51-40-05-0G-0.;[09] VERIFIED STEP #7; NEW RIB #1 INSTALLED.;[10] FINAL INSPECTION; #1 RIB REPLACED.

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