Cessna 172R

  Directional Gyro Operational Check  NOTE:  The permitted limit for gyro drift on the ground or in flight is 4 degrees from a    fixed heading, during a 10-minute period. (1) Start the airplane engine. (2) Make sure that the vacuum system operates correctly. (a) The vacuum gage must show between 4.5 and 5.5 inches Hg. (3) Let the directional gyro become stable for at least 3 minutes. (4) If the directional gyro dial starts to turn, let the gyro become stable and then push the gyro- caging knob. If the gyro dial continues to turn, repair the system and/or replace the gyro. NOTE:  It is usual for the directional gyro dial to turn when the gyro becomes stable. This is not  a cause for removal. (5) Point the airplane's heading to the north. (6) Set the directional gyro to the north. (7) Make sure that the DG  dial drift is not more than 4 degrees in a 10-minute  period. (8) Do steps 5 through 7 again for each cardinal heading (North, West, South, and East).

    PTP Cessna 172 B1 LOC FOT SGH R/I MEL TS B2 LOC FOT SGH R/I MEL TS                        This fuel sampling procedure is required to be carried out before preflight. With the airplane in the normal ground attitude and starting at the highest drain location, check all drain locations for contaminants before every flight, whether or not refueling has occurred. Have fuel sample disposal provisions, proper lighting, and a small ladder at your disposal to properly check for fuel tank system contamination. Drain at least one cup of fuel (using a clear sampler cup) from each drain location. Drain the fuel strainer as required to completely flush its contents in each of the fuel selector positions. Check for water, clarity, cloudiness, haze, proper fuel type/grade (i.e.; 100LL is light blue in tint, jet fuel is clear or yellowish), odor, or other contaminants.  If any contamination is dete

                long-term preservation of engines can result in trapping large amounts of oil in the combustion chambers of one or more cylinders. For this reason, engines should not be rotated until all of the preservative oil is drained away. Failure to do so can result in damage to the piston, connecting rod, and crankshaft of the flooded cylinder    To return the aircraft to service - remove seals, tape, and desiccant bags. Use a solvent to remove tape residue. Remove spark plugs or dehydrator plugs. With the magnetos off, rotate the propeller by hand through sufficient rotations to remove excess preservative oil from the cylinders. Drain the remaining preservative through the sump. Most engines are equipped with a quick-drain oil fitting on one side of the oil sump and a standard AN plug on the other. Remove both in order to drain as much of the preservative oil from the sump as possible. Uninstalled engines should be hoisted level, then tilted as required to aid in draining o

TTP B1-L1 ATA05 Cessna 172 B2-L1 DGCA/CESSNA 172/48     Aircraft Fuel Distribution System DGCA/CESSNA 172/47   --- DGCA/CESSNA 172/46    ENGINE DGCA/CESSNA 172/45    TO PREVENT ERRONEOUS INDICATIONS FROM THE ALTIMETER, AIRSPEED, AND VSI DGCA/CESSNA 172/44    TO PREVENT PREMATURE SEPRATION OF THE COLLAR. DGCA/CESSNA 172/43    TO PREVENT CHAFING OF THE FUEL RETURN LINE ASSEMBLY WHICH COULD RESULT IN FUEL LEAKING AND FUEL VAPOURS, WHICH COULD LEAD TO FIRE DGCA/CESSNA 172/42    CREW SEAT DGCA/CESSNA 172/41     To detect and corect potential loss of fuel flow DGCA/CESSNA 172/40   To replace any incorrect  DGCA/CESSNA 172/39  To Prevent Loss of Airplane due to incorrect or inadequate rigging of                                             critical flight system DGCA/CESSNA 172/38   To Prevent Unintentionally engaging the KAP 140 Autopilot Computer                                           System DGCA/CESSNA 172/37     To detect &am