Supersedes Service Instruction No. 1498
April 13, 2011
Lycoming IO-360-L2A engines installed in Cessna C172R and 172S aircraft used in training operations
TIME OF COMPLIANCE
As necessary during aircraft operations
The fuel system is more susceptible to vapor formation and its effects during operation in warm weather. This Service Instruction identifies vapor symptoms and corrective action necessary to remove vapor from the fuel system.
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