# SDR ASAA2019122391674

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 19, 2019
- Submitted: December 24, 2019
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 43,486 hours, 12,961 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autopilot Sys
- Condition: Disengaged
- Location: A System
- 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/ASAA2019122391674

## Discrepancy

AT FL360 IN SMOOTH CONDITIONS A/P "A" DISENGAGE. NO CAUTIONS LIGHTS OR LIGHTS ON RECALL. REENGAGED A/P "A" & NO FURTHER PROBLEMS. OPERATED NORMAL REST OF FLIGHT. GROUNDED - YES. (RESOLVED ON W/O: 1014603 TASKCARD: N/R-00001 ) FAULT REVIEW SHOWS FAULT MSG 22-11607 "MCP DATA INV". ACCOMPLISHED B737-800  FIM 22-11 TASK 817 "MCP PROBLEM" FAULT ISOLATION, MCP TESTS REF FIM 22-11 TASK 803, DFCS LAND VERIFY TEST (GP 49) REF B737-800 AMM 22-11-00 & HGS SYSTEM TEST REF AMM 34-36-00, OPS CK NML.

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