# SDR ASAA2020102033396

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 20, 2020
- Submitted: October 26, 2020
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 50,803 hours, 15,193 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Actuator
- Part number: 158300101
- Part serial: 18666
- Condition: Faulted
- Location: Elevator
- Part time: 50,826 hours, 15,200 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020102033396

## Discrepancy

ON CLIMBOUT, COULD NOT ENGAGE "A" AUTOPILOT.  WE TRIED MULTIPLE TIMES.  GROUNDED-YES.  REPLACED S"A" SYSTEM ELEV AUTOPILOT ACTUATOR, REF B737-800 AMM 22-11-26.  ACCOMPLISHED A/P ACTUATOR ADJUSTMENT AND TEST, REF AMM 22-11-26-820-801.  ACCOMPLISHED A/P ACTUATOR TEST, REF AMM 22-11-26-710-806, ALL TEST PASS.  ACTUATOR LEAK CHECK GOOD, NO FAULTS.  PERFORMED BITE LIBRARY TEST, REF AMM 22-11-00 ALL LIBRARY TEST FOR A & B CHANNELS, NO FAULT NOTED AT THIS TIME.  PERFORMED LRU REPLACEMENT TTEST FOR FCC A&B, REF AMM 22-11-33 NO FAULTS NOTED. P ERFORMED HGS SYSTEM TEST, REF HGS 4000 SMM 34-36-00 SECT 500 NO FAULTS NOTED.

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