As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST PRIOR TO TOP OF CLIMB VERTICAL AND LATERAL FLIGHT DIRECTOR WAS LOST. AUTOPILOT WENT INTO CWS. AFTER ASSUMING MANUAL CONTROL LNAV/VNAV WAS RESELECTED. NO FURTHER ISSUES. GROUNDED - YES. PERFORMED DFCS BITE TEST PER B737-800 FIM 22-11 TASK 801. TEST PASSED. FAULT HISTORY FCC-A 4EA FAULTS RELATED TO L/H FMC. PERFORMED FIM TASK 22-11 TASK 811. FMC TEST OK.