# SDR AALA201909099005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 7, 2019
- Submitted: September 10, 2019
- Operation: Air carrier
- Aircraft: [N929AN](https://openairdocs.org/aircraft/N929AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30078
- Aircraft time: 58,341 hours, 24,100 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Actuator
- Part number: 158300101
- Part serial: 22840
- Condition: Faulty
- Location: Elevator
- Stage of operation: CR
- 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/AALA201909099005

## Discrepancy

AIRCRAFT WAS GROUNDED: FLIGHT RETURNED TO ORD ON ACCOUNT OF AUTO PILOT TRIM FAULTED. AN EMERGENCY WAS DECLARED AND THE FLIGHT LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE REPORTS DFCS BITE SHOWS FAULT - A/P DISC CHAN-A VNAV SPD LNAV ENG - RAN LRU TEST. HAD FAULT SPEED/STAB CHAN-A ELEV POS SEN-1. MAINTENANCE REPLACED ELEV POS SEN M929 IAW AMM 22-11-30-400-801, NO HELP. MAINTENANCE REMOVED A/P ELEVATOR ACTUATOR SYS A IAW AMM 22-11-26. ACCOMPLISHED AUTOPILOT ELEVATOR ACTUATOR ADJUSTMENT AND TEST IAW AMM 22-11-26-820-801. ALL INDICATION NORMAL, OK FOR SERVICE.

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