Service Letter No. 270
Extended Maintenance Intervals for Spark-Ignited Engines Operated on Unleaded Fuels
April 5, 2017
All Owners and Operators of Lycoming Direct Drive Engines
REASON FOR SERVICE LETTER:
This Service Letter identifies extended maintenance intervals as benefits of routine exclusive use of approved unleaded fuels identified in the latest revision of Service Instruction No. SI-1070 for Lycoming engine models.
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Use our Engine Exchange Program to order a new, rebuilt, or overhauled engine to experience more airtime and less downtime.