# SDR ASAA2018082025813

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 16, 2018
- Submitted: August 20, 2018
- Operation: Air carrier
- Aircraft: [N519AS](https://openairdocs.org/aircraft/N519AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36482
- Aircraft time: 36,570 hours, 10,945 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Unknown
- Condition: Unknown
- Location: Auto Pilot
- 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/ASAA2018082025813

## Discrepancy

AUTOPILOT B DISENGAGED 3 TIMES IN FLIGHT, ONCE IN CLIMB AT 24,000' AND TWICE AT FL360: BOTH ALTITUDES IN SMOOTH AIR. AUTOPILOT A FUNCTION CORRECTLY. GROUNDED - YES. FFR LOGGED NUMEROUS 22-11607 FAULTS. MCP DATA INV. COULD NOT DUPLICATE MALFUNCTION. OP CK NORMAL REF B737-800 FIM 22-11 TASKS 803 & 817. BOTH A/P'S ENGAGED NORMALLY DURING AUTOPILOT TEST.

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