What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Narrative: upon departure at an altitude of 100' a/c started to vibrate slightly. Moments later vibration amplitude increased to a point that the instruments were not readable. Pilot and co-pilot each made visual inspection of respective engines. Pilot noted left engine looked smooth. Co-pilot noted his engine was shaking violently. Both agreed on securing #2. A successful return to the field was accomplished. Upon inspection, it was noted that portions of spinner were missing, one propeller blade had departed approximately 10" from root, and the blade immediately in front of failed blade had a missing counterweight. privacy data omitted
As the FAA filed it
NARRATIVE: UPON DEPARTURE AT AN ALTITUDE OF 100' A/C STARTED TO VIBRATE SLIGHTLY. MOMENTS LATER VIBRATION AMPLITUDE INCREASED TO A POINT THAT THE INSTRUMENTS WERE NOT READABLE. PILOT AND CO-PILOT EACH MADE VISUAL INSPECTION OF RESPECTIVE ENGINES. PILOT NOTED LEFT ENGINE LOOKED SMOOTH. CO-PILOT NOTED HIS ENGINE WAS SHAKING VIOLENTLY. BOTH AGREED ON SECURING #2. A SUCCESSFUL RETURN TO THE FIELD WAS ACCOMPLISHED. UPON INSPECTION, IT WAS NOTED THAT PORTIONS OF SPINNER WERE MISSING, ONE PROPELLER BLADE HAD DEPARTED APPROXIMATELY 10" FROM ROOT, AND THE BLADE IMMEDIATELY IN FRONT OF FAILED BLADE HAD A MISSING COUNTERWEIGHT. ^PRIVACY DATA OMITTED^