What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23)Piper PA-28, N9350J, was enroute on a VFR flight plan with an instrument instructor (CFI) accompanying the non-instrument rated owner/pilot. CFI changed flight plan to IFR during enroute phase due to changing weather conditions. During flight in clouds the vacuum pump impeller shaft failed,rendering the artifical horizon and directional gyro inoperative. The CFI acted as pilot in command and landed the airplane without incident. The pilot/owner of the airplane had the vacuum pump impeler shaft replaced.
As the FAA filed it
(-23)PIPER PA-28, N9350J, WAS ENROUTE ON A VFR FLIGHT PLAN WITH AN INSTRUMENT INSTRUCTOR (CFI) ACCOMPANYING THE NON-INSTRUMENT RATED OWNER/PILOT. CFI CHANGED FLIGHT PLAN TO IFR DURING ENROUTE PHASE DUE TO CHANGING WEATHER CONDITIONS. DURING FLIGHT IN CLOUDS THE VACUUM PUMP IMPELLER SHAFT FAILED,RENDERING THE ARTIFICAL HORIZON AND DIRECTIONAL GYRO INOPERATIVE. THE CFI ACTED AS PILOT IN COMMAND AND LANDED THE AIRPLANE WITHOUT INCIDENT. THE PILOT/OWNER OF THE AIRPLANE HAD THE VACUUM PUMP IMPELER SHAFT REPLACED.