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:
- Aircraft components like control yokes (Cessna 172/180/185) are prone to severe internal corrosion, requiring regular inspection and treatment as per service bulletins.
- Mechanical failures were observed in various systems, including corroded flap bell crank bolts (Cessna 208B), broken landing gear bellcranks (Cessna 340A), disconnected flap linkages (Cessna Citation X), and failed magneto gear shafts.
- Manufacturing quality control issues were also noted, such as a new TCM cylinder missing critical seal counterbores upon incoming inspection.
- The incidents collectively emphasize the critical importance of routine, pre-flight, and incoming inspections to detect corrosion, mechanical wear, and manufacturing defects to ensure flight safety.
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