# SDR AALA202609244705

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 15, 2026
- Submitted: September 24, 2026
- Operation: Air carrier
- Aircraft: [N811NN](https://openairdocs.org/aircraft/N811NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31079
- Aircraft time: 49,979 hours, 21,264 cycles
- System (JASC): [5511 · Horizontal Stabilizer, Spar/Rib](https://openairdocs.org/jasc/5511)
- Part: Rib
- Part number: 186A1001
- 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/AALA202609244705

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: LEFT HORIZONTAL STAB LEADING EDGE CRACKED AT UPPER EDGE OF RIB LOCATED AT LE HSS 300.51.  REMOVED AND REPLACED THE CRACKED RIB AT HSS 300.51 WITH A NEW SERVICEABLE RIB IAW AARD 51-00-05-1 PAR. 1 IAW DRAWING 186A1001.

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