As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN DOOR LATCH ASSEMBLY, TWO IN FLEET. THE DOOR LATCH ASSEMBLIES CONTINUALLY GET OUT OF ADJUSTMENT CAUSING THE INSIDE DOOR HANDLE TO FALL TO THE CLOSED POSITION WHEN THE DOOR IS CLOSED FROM THE OUTSIDE. THIS CAUSES THE DOOR TO LOCK AND BE UNABLE TO OPEN FROM THE OUTSIDE. PROPER TEACHING OF DOOR CLOSING PROCEDURES HELPS, BUT ON A FLIGHT SCHOOL / RENTAL AIRCRAFT IT IS NOT ALWAYS POSSIBLE.