FAA recommends wing inspections for MU–2B turboprops
The FAA is recommending that operators of numerous models of the Mitsubishi MU–2B twin turboprop conduct inspections to check for cracks in the area of wing spacer plates in accordance with two service bulletins issued in 2016.
“It was determined that the cracks resulted from fatigue caused by flight loads,” the SAIB notes. It said MU–2 Service Bulletin No. 245, dated April 21, 2016, and MU–2 Service Bulletin No. 107/57-005, dated May 3, 2016, describe procedures for conducting “a fluorescent penetrant inspection of the wing spacer plates for cracks and replacing cracked wing spacer plates with an improved part.”
“In the event cracks are found and subsequent maintenance is performed in the area of the wing spacer plate that allows for access to the wing spacer plate, the FAA recommends that owners and operators replace the wing spacer plates,” the SAIB notes, referring aircraft operators to the service bulletins for detailed instructions on how to proceed.
