# SDR AALA202608203711

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 19, 2026
- Submitted: August 21, 2026
- Operation: Air carrier
- Aircraft: [N956NN](https://openairdocs.org/aircraft/N956NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31200
- Aircraft time: 35,609 hours, 14,878 cycles
- System (JASC): [2740 · Stabilizer Control System](https://openairdocs.org/jasc/2740)
- Part: Chain
- Part number: 50556050
- Condition: Broken
- Location: Zone 300
- Stage of operation: CL
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202608203711

## Discrepancy

AIRCRAFT WAS GROUNDED: AFTER TAKE OFF, AT 9500FT AND 250KIAS, ELECTRIC STAB TRIM MAKE A CLUNKY NOISE AND BECAME UNRESPONSIVE. MANUAL TRIM WAS UNRESPONSIVE TOO. DECESION MADE TO RETURN TO MIA. EMERGENCY DECLARED AND LANDED OVERWEIGHT WITHOUT INCIDENT. LANDING MADE AT 140,000LBS. AND FLAPS 15. MAINTENANCE FOUND CONTROL WHEEL STAB-TRIM CHAIN BROKEN AND REPLACED CHAIN FOR THE STAB TRIM IAW AMM 27-41-00.

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