Airworthiness Bulletin on Cessna T206H Aircraft

Special Airworthiness Information Bulletin (SAIB) CE-13-07 informs owners, operators, and maintenance personnel of Cessna Aircraft Company Model T206H airplanes about the potential for in-flight fire as a result of failure of the V-band coupling (V-band clamp) securing the tailpipe to the turbocharger or the wastegate elbow to the wastegate valve. At this time, this airworthiness concern is not an unsafe condition that would warrant airworthiness directive action under Title 14 of the Code of Federal Regulations, part 39.

This SAIB is the result of an in-flight fire on a Cessna T206H with only 1,000 hours time-in-service (TIS) since new. Investigation revealed the V-band coupling that secures the tailpipe to the turbocharger housing had failed in-flight resulting in hot exhaust gas impingement on the firewall and consequent burning around the base of the firewall into airplane structures. The amphibious airplane had spent approximately 700 hours TIS of its life in or near salt water. Per the recommendations contained in the Cessna T206H maintenance manual (MM); up to the time of the fire, the incident airplane should have undergone (20) 50-hour specific inspections of the V-band coupling and had (10) annual inspections, which also identify the specific inspection of the V-band coupling. This indicates the need for greater diligence in inspection and replacement of the exhaust system V-band couplings and adherence to the recommended inspection intervals and procedures contained in the maintenance manual.

Read more on the link to the FAA bulletin.

default iconCE-13-07.pdf

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