AD 2022-17-04 Prompted By Reports Of Broken P-Clamps On The Pressure Relief Line
The FAA is adopting a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC-8-400 series airplanes. This AD was prompted by reports of broken P-clamps on the pressure relief line and the motive flow line in the fuel tanks, and a subsequent determination that certain service information lacked instructions for maintaining appropriate clearance between certain fuel tubes and their support brackets, and may also have led to incorrect installation of certain TeflonTM sleeves. This AD was also prompted by a determination that new or more restrictive airworthiness limitations are necessary.
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