Cirrus SR22 — Service Bulletins

This Service Bulletin, TAT SB08-01, issued by Tornado Alley Turbo on February 8, 2008, is directed towards owners and operators of the Cirrus SR22 aircraft equipped with the Tornado Alley Turbo Turbonormalizing System. It outlines mandatory procedures for modifying the exhaust elbows to enhance the durability of the tailpipe assemblies. The bulletin specifies different compliance requirements for two groups of aircraft based on their serial numbers, detailing the necessary inspections and modifications for the right-hand and both left and right-hand exhaust elbows. Compliance is required within 25 flight hours or at the next scheduled maintenance, whichever comes first. The document also includes warranty information and instructions for completing the modifications.

• Mandatory compliance within 25 flight hours or at the next scheduled maintenance.
• Group A aircraft require modification of the right-hand exhaust elbow; Group B requires both elbows.
• Manpower requirements: 1.25 hours for Group A, 2.25 hours for Group B.
• Labor costs for the modification are covered under warranty by the STC holder.
• Inspection for cracks in the exhaust elbow weld is critical before modification.