Significant Regulatory Activity.

The article reports on significant aviation regulations due to be implemented in the U.S. in March and April 2007. They include Airworthiness Directive (AD) 2007-04-22 which results from a report that an airplane encountered an uncommanded propeller feathering during climb, which resulted in an emergency landing, AD 2007-04-24 which aimed to correct missing or fractured attachment bolts, which could lead to the loss of an engine exhaust nozzle during flight.