# SDR AALA202003119004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 10, 2020
- Submitted: March 11, 2020
- Operation: Air carrier
- Aircraft: [N955AN](https://openairdocs.org/aircraft/N955AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29540
- Aircraft time: 57,791 hours, 24,142 cycles
- System (JASC): [2740 · Stabilizer Control System](https://openairdocs.org/jasc/2740)
- Part: Relay
- Part number: R850
- Condition: Faulty
- 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/AALA202003119004

## Discrepancy

AIRCRAFT WAS GROUNDED: RETURNED TO CUN ACCOUNT STABILIZER TRIM MALFUNCTION, NOSE DOWN ELECTRIC PITCH TRIM INOPERATIVE. EMERGENCY WAS DECLARED. ACCOMPLLISHED FIM 27-41-00-810-802 FOUND RELAY R850 FAULTY, REMOVED AND REPLACED HORIZONTAL STAB INTERLOCK RELAY R850 IAW AMM 27-41-98-401, ACCOMPLISHED STABILIZER ELECTRIC TRIM SYSTEM TEST IAW AMM 27-41-00-700-803. ALL TEST PASSED.

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