MIAMI – The FAA has sent out an Airworthiness Directive (AD) ordering the immediate inspection of Boeing 777-200s fitted with Pratt & Whitney PW4000 engines following the recent United Airlines (UA) incident involving the aircraft and engine type. The directive notes that the inspection has been ordered due to the recent event in which a United Airlines Boeing 777 aircraft was forced to perform an emergency landing following one of its engines exploding mid-air. According to the FAA, the in-flight failure of low-pressure compressor blades on PW4077 engines resulted in the engine’s uncontained event. According to the AD, each engine will require an extensive test to determine if any cracks are evident on its blades. The airline has already grounded all of its Boeing 777-200s fitted with PW4000 engines in preparation for the AD.