What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
CFI and student were inbound to hqm and student noted oscillation in control yoke. No noticable defects were found after landing. On departure the oscillation returned and the two occupants of the aircraft observed the right elevator fluttering 12 inches peak to peak. CFI flew aircraft back to hqm. Post flight inspection revealed the elevator had separated from the horizontal stab at the right outboard hinge point. Further inspection revealed the bolt securing the elevator to the hinge point had backed completely out.
As the FAA filed it
CFI AND STUDENT WERE INBOUND TO HQM AND STUDENT NOTED OSCILLATION IN CONTROL YOKE. NO NOTICABLE DEFECTS WERE FOUND AFTER LANDING. ON DEPARTURE THE OSCILLATION RETURNED AND THE TWO OCCUPANTS OF THE AIRCRAFT OBSERVED THE RIGHT ELEVATOR FLUTTERING 12 INCHES PEAK TO PEAK. CFI FLEW AIRCRAFT BACK TO HQM. POST FLIGHT INSPECTION REVEALED THE ELEVATOR HAD SEPARATED FROM THE HORIZONTAL STAB AT THE RIGHT OUTBOARD HINGE POINT. FURTHER INSPECTION REVEALED THE BOLT SECURING THE ELEVATOR TO THE HINGE POINT HAD BACKED COMPLETELY OUT.