SDR ASAA2016040516248

Service difficulty report · Autopilot Sys · Boeing 737890

Difficulty date: April 5, 2016
Submitted: April 7, 2016
Operation: Air carrier
Aircraft: N508AS
Make and model: Boeing 737890
Aircraft serial: 35691
Aircraft time: 29,589 hours, 9,006 cycles
System (JASC): 2210 · Autopilot System
Part: Autopilot Sys
Condition: Malfunctioned
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

"A" AUTOPILOT DISENGAGED TWICE DURING FLIGHT AT CRUISE ALTITUDE. USED "B" A/P FOR REMAINDER, NO ISSUES. ACFT GROUNDED. FFR SHOWED 2 FAULTS FOR MCP. ACCOMPLISHED DFCS LRU INTERFACE TEST FOR MCP, BITE GROUP NR 32, LAND VERIFY, BITE GROUP NR 49, AND HGS SENSOR TEST FCC/AT, REF HGS SMM 34-36-00. ALL TEST PASS.