Transcription of TEXTRON LYCOMING - SERVICE BULLETINS, INSTRUCTIONS …
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652 Oliver Street Williamsport. PA 17701 U S A DATE : February 18, 1977 MANDATORY SERVICE Bulletin No. 301B (Supersedes SERVICE Bulletin No. 301A) Engineering Aspects are FAA (DEER) Approved SUBJECT : Maintenance Procedures and SERVICE Limitations for Valves MODELS AFFECTED: All Avco LYCOMING opposed series aircraft engines. TIME OF COMPLIANCE: During periodic maintenance and when intake and exhaust valves are removed from cylinders. Valves used in Avco LYCOMING aircraft en- gines are made from various steel alloys and in a variety of designs, each dependent on the requirements for the particular engine model in which it is employed.
652 Oliver Street Williamsport. PA 17701 U S A 7171323.6181 DATE : February 18, 1977 MANDATORY Service Bulletin No. 301B (Supersedes Service Bulletin No. 301A)
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