# SDR CALA2021122902459

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 27, 2021
- Submitted: December 29, 2021
- Operation: Air carrier
- Aircraft: [N37434](https://openairdocs.org/aircraft/N37434), registered now
- Make and model: Boeing 737-900ER
- Registry model: [Boeing 737-900ER](https://openairdocs.org/model/boeing-737-900er) (OpenAirDocs)
- Aircraft serial: 33528
- Aircraft time: 36,047 hours, 12,781 cycles
- System (JASC): [5510 · Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510)
- Part: Skin
- Part number: 182A40012
- Condition: Cracked
- Location: Rh Hor Stab
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2021122902459

## Discrepancy

SUPPORT TASK - R/H HORIZONTAL STABILIZER - CRACK FOUND AT STAB STA 157,  9.5" FWD OF REAR SPAR & I/B OF DRAIN HOLE .CRACK LENGTH : 0.433" REPAIR 11 AND FIGURE 206/ REPAIR 11  REF NR 9643097 REMOVED CRACK ON R/H HORIZONTAL STAB STA-157 I.A.W B737-900 SRM 55-10-01-2R-11 FIGURE 204, DETAIL F, INSTALLED REPAIR DOUBLER. INSPECTION REQUIERED 9,000 FLIGHT CYCLES PER 55-10-01-2R-11 TABLE 204/ ADD EMP:V900541

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