Cessna 172/180/185 Control Yoke Corrosion Transport Canada (TC) in late 2009 issued a Service Difficulty Alert detailing failure of a parked aircrafts control yoke that broke during high-wind conditions. A complete fracture occurred between the yoke pivot area and the elevator attachment point due to severe internal corrosion. A 2001 288
Missing And Disconnected
Transport Canada (TC) in late 2009 issued a Service Difficulty Alert detailing failure of a parked aircrafts control yoke that broke during high-wind conditions. A complete fracture occurred between the yoke pivot area and the elevator attachment point due to severe internal corrosion. A 2001 Cessna service bulletin provides instructions for creating an inspection hole, recommending annual inspection and corrosion treatment.
Key Takeaways:
- Multiple Cessna aircraft models experienced critical corrosion issues, including a fractured control yoke on a Cessna 172/180/185 and frozen flap bell crank bolts on a Cessna 208B.
- Various mechanical failures were reported, such as a broken main landing gear door idler bellcrank on a Cessna 340A and a disconnected flap linkage on a Cessna Citation X, impacting aircraft control.
- New components were found with manufacturing defects (e.g., a TCM cylinder missing seal counterbores), while others experienced in-service failures (e.g., a Slick Magneto gear shaft failure causing engine RPM drop).
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