# SDR ASAA2020101933388

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 19, 2020
- Submitted: October 21, 2020
- Operation: Air carrier
- Aircraft: [N535AS](https://openairdocs.org/aircraft/N535AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35200
- Aircraft time: 36,111 hours, 10,418 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Part number: 4082260939
- Part serial: 00021997
- Condition: Faulty
- Location: Mode
- Part time: 65,946 hours, 27,502 cycles
- Stage of operation: CR
- 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/ASAA2020101933388

## Discrepancy

AUTO PILOT A TRIPPED OFF AT CRUISE.  REASON UNKNOWN.  GROUNDED-YES.  ACCOMPLISHED DFCS BITE B737-800 FIM 22-11 TASK 801.  NO CURRENT FAULTS FOUND. FLIGHT FAULT REVIEW HAS MESSAGE 22-11607 SEVERAL FLIGHT LEGS.  REMOVED AND INSTALLED NEW MCP, REF B737-800 AMM 22-11-34.  PERFORMED MCP OSP TEST, REF AMM 22-11-34-740-801.  ALL TESTS PASSED.  ACCOMPLISHED LLM TEST LRU REPLACEMENT BITE GROUP NR 32.  ALL TESTS PASSED.  ACCOMPLISHED LAND VERIFY TEST BITE GROUP NR 49.  ALL TESTS PASSED.  ACCOMPLISHED DFCS MCP ADJ/TESTS AMM 22-11-34-501.  ALL TESTS PASSED.

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