# SDR AALA202003109008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 8, 2020
- Submitted: March 10, 2020
- Operation: Air carrier
- Aircraft: [N309PC](https://openairdocs.org/aircraft/N309PC), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31258
- Aircraft time: 10,270 hours, 4,091 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Condition: Faulty
- Location: Autopilot Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202003109008

## Discrepancy

AIRCRAFT NOT GROUNDED: UNCOMMANDED AUTOPILOT DISCONNECTS OCCURRED MULTIPLE TIMES AT FL390 WITH EITHER SYSTEM A OR B ENGAGED. NO OTHER AIRCRAFT DISCREPENCIES NOTED AT TIME OF DISCONNECTS. PERFORMED BITE ON DFCS AND FOUND MULTIPLE FAULTS ON BOTH A AND B CHANNELS. REMOVED AND REPLACED MODE CONT. PANEL IAW M/M 22-11-34.

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