What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
A banner tow cable and hook separated from N643G while on left base to runway 18 at 1C5 and penetrated the roof of 1025 chuchill drive Bolingbrook, Illinois 60440. No damage was caused to N643G. No accident or injuries to persons ensued. The banner tow release handle was mis-rigged allowing the operator to release the banner by either pushing or pulling the handle instead of the intended pulling action only.
As the FAA filed it
A BANNER TOW CABLE AND HOOK SEPARATED FROM N643G WHILE ON LEFT BASE TO RUNWAY 18 AT 1C5 AND PENETRATED THE ROOF OF 1025 CHUCHILL DRIVE BOLINGBROOK, ILLINOIS 60440. NO DAMAGE WAS CAUSED TO N643G. NO ACCIDENT OR INJURIES TO PERSONS ENSUED. THE BANNER TOW RELEASE HANDLE WAS MIS-RIGGED ALLOWING THE OPERATOR TO RELEASE THE BANNER BY EITHER PUSHING OR PULLING THE HANDLE INSTEAD OF THE INTENDED PULLING ACTION ONLY.