# SDR CALA2026040815218

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 26, 2026
- Submitted: April 8, 2026
- Operation: Air carrier
- Aircraft: [N57439](https://openairdocs.org/aircraft/N57439), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 33534
- Aircraft time: 52,623 hours, 18,770 cycles
- System (JASC): [5512 · Horizontal Stabilizer, Plate/Skin](https://openairdocs.org/jasc/5512)
- Part: Skin
- Part number: 182A40022
- Condition: Cracked
- Location: Zone 300
- 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/CALA2026040815218

## Discrepancy

RIGHT HORIZONTAL STAB. LOWER SKIN HAS CONFIRMED CRACK INDICATION,  1.400"L, INBD OF INBD ROW OF FASTENERS AT HSS 184.70, 8" FWD OF AFT SPAR.   RIB REPAIRED IAW SRM 55-10-01-2R-11 REPAIR 11. THIS REPAIRIS A CAT B REPAIR REQUIRING SUPPLEMENTAL INSPECTION PER B737-900 SRM 55-10-01-2R-11 PARA 5, TABLE 204. INSPECTION THREHOLS 56,000 TFC.

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