On May 11, 2017, the FAA issued a Special Airworthiness Information Bulletin (SAIB) that highlights the potential for loose elevator attach bolts on certain Cessna 150/152 models. The SAIB was issued based on a service difficulty report of an elevator hinge bolt backing out on a C-150. The FAA recommends performing the inspections detailed in the Cessna supplemental inspection document (SID) 55-10-01. Both the SAIB and the SID(s) can be found here.
The FAA also issued an SAIB on May 10 which outlines available service instructions for identifying causes of engine kickback and recommended engine inspections following a kickback event on certain Continental Motors, Inc., 550 and 520 series reciprocating engines. See the full bulletin here.