An investigation revealed the elevator bellcrank bracket (P/N 0513063-3), which is held in place by only two rivets, was badly broken. The submitter believes total loss of elevator control would have been forthcoming had the bracket not been replaced.
The bracket location is at the left forward attachment angle under the cabin floor aft on the fuel selector.

The submitter stated this defect was difficult to detect because the control function was normal. Also, this area is difficult to inspect due to the location. He suggested putting in the control lock and checking the elevator for movement of more than 2 inches.

A search of the FAA Service Difficulty Reporting Program data base revealed 11 reports of cracked elevator control brackets on the Cessna 172 series aircraft. The data base also revealed the replacement part is much stronger than the original part.

Part total time-3,500 hours.