As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
V NAV INOP AFTER TAKEOFF. GROUNDED - YES. UNABLE TO DUPLICATE PROBLEM. PERFORMED DFCS OPS TEST PER AMM 22-11-00 AND MCP TEST PER AMM 22-11-34, OPS NORMAL. NO HISTORY LAST 30 DAYS. ALSO INBOUND FLT CREW VERBALIZED THAT VNAV OPERATED NORMALLY. CLEARS MEL 22-15Y.