# SDR CALA2026033114967

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 2026
- Submitted: March 31, 2026
- Operation: Air carrier
- Aircraft: [N57439](https://openairdocs.org/aircraft/N57439), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 33534
- Aircraft time: 52,618 hours, 18,767 cycles
- System (JASC): [5511 · Horizontal Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5511)
- Part: Rib
- Part number: 182A5401
- 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/CALA2026033114967

## Discrepancy

LEFT HORIZONTAL STAB INTERNAL RIB,  HSS 147.90  CRACKED AT THE BOTTOM OF THE NR 2 VERTICAL STIFFENER ON THE INBD FACING SIDE OF THE RIB.  REMOVED ONE DOUBLER AND FILLER TO FOM IAW SRM 51-40-02.  CUTOUT THE CRACK IAW SRM 55-10-09-2R.  FABRICATED REPAIR ANGLE,  TEE ANGLE, FILLER, & DOUBLER IAW SRM 55-10-09-2R, & SRM 55-10-01-2R-11.  INSTALLED ALL REPAIR PARTS IAW SRM 55-10-09-2R-5, AND SRM 55-10-01-2R-11. APPLIED TO COAT IAW AMM 51-21-73.

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