Cessna 172R

           (1) Initial Inspecton _, inspect the fuel injector fuel lines and clamps between the fuel manifold and the fuel injector nozzles. Use MSB No. 342G,  to perform the inspection. Replace any fuel injector fuel line or clamp that fails the inspection required by the Fuel Line Inspection and Installation Checklist in MSB No. 342G.          (2) Re-inspect after any maintenance is done on the engine where any clamp on a fuel injector fuel line was disconnected, moved, or loosened, and within every 110 hours TIS and after each engine overhaul. 

  Subject  - Diaphragm-Type Fuel Pump Replacement                   This SB is notification of a requirement to replace specific diaphragm-type fuel pumps identified herein as a corrective action in response to a confirmed non-conforming fuel pump in the field. Continued operation of a non-conforming fuel pump can cause fuel leakage out of the airframer’s vent line or into the engine crankcase.                   Each fuel pump has a 13-digit alphanumeric manufacturer’s code, which begins with two  letters. The alphanumeric characters in the manufacturer’s code and its location on the fuel pump will help identify the fuel pumps affected by this Service Bulletin. The first two characters in the example manufacturer’s code RC20150620703 in are RC. The next two numbers 20 identify the manufacturing week of the year as 20 and 15 is the year. The manufacturer’s code is on the fuel ...

TTP B1-L3 ATA71 Cessna 172 B2-L1 Lycoming's preservation procedure : Drain the lubricating oil from the sump or system and replace with a preservative oil mixture. This preservation mixture consists of one part by volume MIL-C-6529C Type I concentrated preservative compound added to three parts by volume of MIL-L-6082C (SAE J1966), Grade 1100, mineral aircraft engine oil or oil conforming to MIL-C-6529C Type II. Follow carefully the manufacturer's instructions before use. An alternative method is the use of Cortec VC1-326 preservative concentrate added to the original oil at a ratio of 1 part VC1-326 to 10 parts of oil. Operate the engine until normal temperatures are obtained. Do not stop engine until oil temperature has reached 180°F. If weather conditions are below freezing, oil temperature should reach at least 165°F before shut down. Remove sufficient cowling to gain access to the top spark plugs and remove them. Through the...