As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALTITUDE PRESELECT NOT HOLDING ALTITUDE/DEPARTED PRESELECT AND RAN UP AND DOWN UNCONTROLLABLE. PRESELECT KNOB WOULD NOT CONTROL. DISENGAGED AP AND HAND FLEW PLANE. REMOVED AND REPLACED FCP IAW MM 22-10-07. FCP & AP OPS CHECK GOOD IAW MM 22-11-07.