As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN VNAV (SPD INTV) AND LVL CHG MODES IAS/MACH COULD NOT BE CHANGED BY MORE THAN 1KT/.01 MACH. GROUNDED - YES. PERFORMED LLM TEST PER AMM 22-00-01 LIBRARY GROUPS 49 LAND VERIFIED AND 70 EXTENDED MAINT TEST SYSTEM OP CHECKS GOOD NO DEFECTS NOTED.