# SDR AALA202504215931

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 2025
- Submitted: April 21, 2025
- Operation: Air carrier
- Aircraft: [N825NN](https://openairdocs.org/aircraft/N825NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31087
- Aircraft time: 45,401 hours, 19,236 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Trim Switch
- Condition: Out Of Position
- Location: Zone 200
- Stage of operation: CR
- How discovered: O
- Nature of condition: F, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202504215931

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: STAB OUT OF TRIM LIGHT ILLUMINATED DURING CRUISE WITH EITHER AUTOPILOT A OR B ENGAGED; THE LIGHT FLICKERED INDEPENDENT OF TURBULENCE. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT FSD. FOUND YAW DAMPER SWITCH IN OFF POSITION, PLACED IN THE ON POSITION, ACCOMPLISHED FIM 22-11-00-810-851, DFCS BITE, AND BITE LIBRARY TEST 60.32 NO FAULTS NOTED.

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