# SDR CALA2021122202421

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 21, 2021
- Submitted: December 22, 2021
- Operation: Air carrier
- Aircraft: [N37434](https://openairdocs.org/aircraft/N37434), registered now
- Make and model: Boeing 737900
- Aircraft serial: 33528
- Aircraft time: 36,047 hours, 12,781 cycles
- System (JASC): [5500 · Empennage Structure](https://openairdocs.org/jasc/5500)
- Part: Rib
- Part number: 182A53021
- Condition: Cracked
- Location: Sta101
- 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/CALA2021122202421

## Discrepancy

RT HORIZONTAL STAB RIB AT STA 101 LOWER CHORD I/B FASTNER HOLE HAS A SMALL CRACK JUST BELOW CENTER LIGHTING HOLE REF AAR N/R 9644094 REMOVED ANGLE AREA INSTALLED 1EA REPAIR ANGLE ON R/H HORIZONTAL STAB RIT AT STA 101 LOWER CHOED AS PER B737 SRM 55-10-09-2R-5 FIG 204 SHEET 1 WORK ACCOMPLISHED BY V920362

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