Service Instruction No. 1148 C
Use of Carburetor Heat Control
Supersedes Service Instruction No. 1148C
October 12, 2007
All Lycoming engines using float type carburetors.
TIME OF COMPLIANCE
During engine operation.
Under certain moist atmospheric conditions (generally at a relative humidity of 50% or greater) and at temperatures of 20° to 90°F it is possible for ice to form in the induction system.
Get It Exchanged
Use our Engine Exchange Program to order a new, rebuilt, or overhauled engine to experience more airtime and less downtime.