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Here are some reproduced Service Letters from the private collection of Aeronca owners.   For official copies of these documents, please contact the type certificate holder, the FAA or other official sources.  Use at your own risk.

Some of the documents are missing. If you have a copy, please send them to me.

Lycoming Service Bulletins

Doc
Num		 Issued By
Issue Date		 Description Service Bulletin & Associated Files
102  Lycoming
4/15/1941 		Recommended Overhaul Procedure - O-145 & GO-145 
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103  Lycoming
4/25/1941 		Installation of Air Cleaner on O-145 & GO-145 
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104  Lycoming
4/25/1941 		Inspection of O-145 & GO-145 Engines for Oil Leaks at No. 1 and No. 4 Cylinder Bases. 
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105  Lycoming
9/8/1941 		Service Hints for Lycoming O-145 and GO-145 Engines 
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106  Lycoming
10/6/1942 		Replacement of Exhaust Values. O-145 & GO-145 Engines. 
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107  Lycoming
9/1/1944 		Index of Service Bulletins 
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108  Lycoming
12/5/1944 		Magni Flus Inspection of Lycoming O-145 & GO-145 Aircraft Engine Crankshaft 
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