# SDR HNAA2017082100280

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2017
- Submitted: August 21, 2017
- Operation: Air carrier
- Aircraft: [N635AE](https://openairdocs.org/aircraft/N635AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145158
- Aircraft time: 41,271 hours, 37,750 cycles
- System (JASC): [2700 · Flight Control System](https://openairdocs.org/jasc/2700)
- Part: Switch
- Condition: Malfunctioned
- Location: Trim
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA2017082100280

## Discrepancy

IMMEDIATELY AFTER TAKEOFF, LG AIR/GRD FAIL CAUTION MESSAGE DISPLAYED ON EICAS AND PITCH TRIM MAIN INOPERATIVE WARNING MESSAGE. PITCH TRIM RUN AWAY TO NOSE DOWN.  R & R THE BACKUP TRIM SWITCH AND OPS CHECKED IAW AMM 20-13-05. OPS CHECKED GOOD. COULD NOT DUPLICATE.  R & R LGEU AS PRECAUTIONARY MEASURE.

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