# SDR ASAA2022061238631

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 12, 2022
- Submitted: June 27, 2022
- Operation: Air carrier
- Aircraft: [N513AS](https://openairdocs.org/aircraft/N513AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35192
- Aircraft time: 48,741 hours, 14,527 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Actuator
- Part number: 158300101
- Part serial: 20788
- Condition: Corroded
- Location: Bs 1156 Bulkhead
- Part time: 48,775 hours, 14,539 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022061238631

## Discrepancy

"A" AUTOPILOT WILL NOT STAY ENGAGED. GROUNDED - YES. FOUND BAD "A" A/P ELEVATOR ACTUATOR AND PLUG CORRODED. REMOVED AND REPLACED AUTOPILOT ELEVATOR ACTUATOR "A" REF B737-800 AMM 22-11-26, CONNECTOR D1681 REF B737 SWPM 20-61-00 AND AUTOPILOT ELEVATOR "A" PRESSURE SWITCH REF AMM 22-11-40. LEAK CHECK GOOD. REF AMM 22-11-26-710-801 AUTOPILOT ELEVATOR ACTUATOR TEST GOOD. LAND VERIFY GOOD REF AMM 22-11-00. OPERATIONAL CHECK OF AUTOPILOT ACTUATOR TEST "A" CHECKED GOOD REF AMM TASK 22-11-26-710-801. LLM MAINTENANCE TEST PASSED REF AMM TASK 22-11-26-839-001. NO FAULTS FOUND. ETOPS GROUND VERIFICATION SUCCESSFUL.

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