Australia’s Civil Aviation Authority (CASA) has grounded several Cessna 441 Conquest IIs, citing the potential for in-flight structural failures on aircraft that have surpassed 22,500 hours. CASA stated that the defect, located near the rear pressure dome, could cause the tail to separate during flight. A Cessna spokeswoman told AIN that the company issued a supplemental inspection document for the Conquest, which recommends the 22,500-hour limit, after reviewing test and field data as part of its continuing safety process. There are currently 34 Conquests operating in Australia, and four have been grounded.