Cessna 172R

INDEX Service BulletinsLetters and Instructions Lycoming Publication

Textron Lycoming IO-360-L2A engine is direct drive , four cylinder , fuel injected, horizontally opposed , and air cooled . The cylinders, numbered from front to rear, are staggered to have individual throws on the crankshaft for each connecting rod. The right front cylinder is number 1 and cylinders on the right side of the engine are identified by odd numbers 1 and 3. The left front cylinder is number 2 and the cylinders on the left side are identified as 2 and 4. Cylinders –  are of air-cooled construction with the two major parts, head and barrel, screwed and shrunk together. Heads are made from an aluminum alloy casting with a fully machined combustion chamber. Rocker shaft bearing supports are cast integral with the head along with housings to form the rocker boxes. Barrels have deep integral cooling fins and the inside of the barrels are ground and honed to a specified finish. Valve Operating Mechanism – C amshaft is located above and parallel to the crankshaft. The

TTP B1-L1 ATA06 Cessna 172 B2-L1 Airplane Station : The airplane is laid out according to fuselage stations (FS) and wing stations (WS). These stations provide fixed reference points for all components located on or within the airplane.   Fuselage Stations begin at the firewall (FS 0.00) and extend to the tailcone area (FS 230.18).  Wing Stations begin at the root (WS 23.62) and extend to the tip (WS 208.00). Both Fuselage Stations and Wing Stations are measured in inches. For example, FS 185.50 is 185.50 inches aft of the firewall (FS 0.00). Zone : The Model 172 is divided into numbered zones to provide a method for locating components and/or placards throughout the airplane. The zones are identified by a three-digit number as shown in the example below.  First digit in the sequence denotes the major zone (300 series for aft of cabin, 500 series for left wing, etc.).  Second digit in the sequence further divides the zone in

TTP B1-L1 ATA34 Cessna 172 B2-L1                   GTX 33 transponder is integrated into the G1000 system, offering Mode A, Mode C and Mode S interrogation and reply capabilities. The transponder controls are located on the G1000 Primary Flight Display (PFD) on the lower portion of the screen TRANSPONDER SOFTKEYS   -   transponder function spans three levels of soft keys; the Top-level, the Mode Selection and the Code Selection soft keys. When the Top-level XPDR softkey is pressed, the  following softkeys appear in the softkey bar : STBY , ON , ALT , VFR , CODE , IDENT , BACK When the CODE softkey is pressed, the number softkeys appear in the softkey bar : 0 , 1, 2 , 3 , 4 , 5 , 6 , 7 , IDENT , BKSP, BACK . The digits 8 and 9 are not used for code entry. Pressing the BKSP softkey backs up code selection to the previous digit. Pressing the BACK softkey during code selection reverts to the MODE Selection softkeys . Pressing the BACK soft

TTP B1-L3 ATA70A Cessna 172 B2-L1 Engine System

TTP B1-L3 ATA70 Cessna 172 B2-L1

TTP B1-L3 ATA27 Cessna 172 B2-L2 Fight control system consists of conventional aileron, rudder and  elevator control surfaces. The control surfaces are manually operated through  mechanical linkages to the control wheel for the ailerons and elevator, and  rudder/brake pedals for the rudder. A manually-operated elevator trim tab is  provided and installed on the right elevator. The control surfaces are formed in a similar way to the wing and tail section with the inclusion of the balance weights, actuation system (control cables etc) and trim tabs. Control actuation is provided by a series of push-pull rods, bellcranks, pulleys and cables with the required individual connections. Ailerons receive input from the pilot or copilot control wheel through a series of sprockets,  chains, pulleys, cables, bell cranks, and pushrods Elevator are operated by power transmitted through forward and aft movement of the control yoke. This movem