Engine - Construction & Operation

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TTP
B1-L3
ATA70A
Cessna 172
B2-L1









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VACUUM SYSTEM

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TTP B1-L3 ATA37 Cessna 172 B2-L2   V acuum system has a filter, vacuum gage, vacuum instruments, regulator valve, vacuum manifold,  low vacuum annunciator switches, engine-driven vacuum pumps and related plumbing.   With   Garmin G1000, the source of vacuum air is in the cabin and is pulled through the  system by the engine-driven vacuum pumps. This air goes through the gyro filter at the cabin inlet source  before it goes through the vacuum gage and gyro instruments. The vacuum is controlled by the regulator  valve. The regulator valve is on the aft side of the firewall. The vacuum air is then pulled through the  vacuum manifold and past the low vacuum annunciator switches and then into the vacuum pumps. Without Garmin G1000, vacuum pressure is measured by the low vacuum annunciator   switches in the engine compartment. The vacuum gage in the instrument panel shows the vacuum  pres...
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LEVELING

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TTP B1-L1 ATA08 Cessna 172 B2-L1             PTP Cessna 172 B1 LOC SGH B2 LOC SGH Required tools, equipment and materials-. Leveling Points Lateral Leveling. (1) Find two points that are the same on each upper door sill of the left and right cabin doors. (2) Put a level in position across these points. NOTE: Out-of-level tolerance for wing tips is three inches total. (3) Make a note of the airplane's lateral position. (4) If applicable, put jacks in position at the wings and tail jacking points. (a) Adjust the wing jacks as required to get the necessary lateral position. Longitudinal Leveling. (1) Find the two screws on the left side of the airplane tailcone that are in line with water line zero. (2) Remove the screws. (3) Install studs or long screws of applicable length (approximately two inches long). (4) Put the level...
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FAA AD 2015-19-07 Lycoming Fuel Injected Reciprocating Engines

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           (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. 
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