SPARK PLUG INSTALLATION

        INSTALLATION INSTRUCTIONS
               Ref : CMI SIL 03-2C
        Install spark plugs as follows, in addition to the instructions provided by the spark plug manufacturer.
1. Handle spark plug leads with clean, dry hands.
2. Adjust the spark plug electrode to the gap recommended by the manufacturer.
3. Always install spark plugs with new copper gasket.
4. Sparingly apply anti-seize to the spark plug threads. DO NOT APPLY ANTI-SEIZE
TO THE FIRST ROW OF THREADS.
5. Always use a six point deep well socket to install spark plugs.
6. Thread spark plug by hand into cylinder to within one or two threads of the gasket. If this is not possible, cylinder head threads or spark plug threads need to be cleaned.
7. Torque spark plugs to 300 - 360 in. lbs using a calibrated torque wrench.
8. Before installing the spark plug lead terminal, wipe it clean using a lint-free cloth moistened with isopropyl alcohol. Once dry, apply CMI Part Number 10-400533 (Miller-Stephenson MS -122AD) to the terminal insulator.
9. Ensure the inside of spark plug barrel is clean and dry.
10. Insert spark plug lead connector into the spark plug barrel with fingers in a straight  line with the spark plug.
11. Screw B-nut into place until finger tight.
12. Tighten the B-nut to the torque specified in Table 1 while holding the spark plug lead ferrule stationary
           Spark Plug B-Nut Torque
THREAD       WRENCH          TORQUE
5/8”-24          3/4”                 90-95 in. lbs.
3/4”-20          7/8”            110-120 in. lbs.

Comments

Post a Comment

Popular posts from this blog

Cessna 152 Magneto Check

MAGNETO CHECK. NEVER ADVANCE TIMING BEYOND SPECIFICATIONS IN ORDER TO REDUCE RPM DROP. Too much importance is being attached to RPM drop in single ignition. RPM drop on single ignition is a natural characteristic of dual ignition design. The purpose of the following magneto check is to determine that all cylinders are firing. If all cylinders are not firing, the engine will run extremely rough and cause for investigation will be quite apparent. The amount of RPM drop is not necessarily significant and will be influenced by ambient air temperature, humidity, airport altitude, etc. In fact, absence of RPM drop should be cause for suspicion that the magneto timing has been bumped up and is set in advance of the setting specified. Magneto checks should be performed on a comparative basis between individual right and left magneto performance. a. Start and run engine until the oil and cylinder head temperatures are in normal operating ranges. b. Advance engine speed to 1700 RPM. c. Tu
Read more

Brake System Cessna 172

                             BRAKE SYSTEM -MAINTENANCE PRACTICES              1. Description and Operation A. The hydraulic brake system is comprised of two master cylinders, located immediately forward of the  pilot’s rudder pedals, brake lines and hoses, and single-disc, floating cylinder brake assemblies located at  each main landing gear wheel. B. The parking brake system is comprised of a pull-type handle and mechanical connections which are  linked to the rudder pedal assembly. Pulling aft on the brake handle applies mechanical pressure to the  rudder pedals, activating the brakes and locks the handle in place. Turning the handle 90 degrees will  release the parking brake and allow for normal operation through the rudder pedals. C. Brake operation is accomplished by pushing on the upper part of each rudder pedal. This motion is  mechanically transmitted to the respective brake master cylinder, and through fluid-carrying lines out to  the brake assembly where fluid pressure
Read more

McCauley Propeller Installation fixed pitch

Image
Propeller Installation for all fixed pitch propellers (except 1A162 model propellers).                   WARNING: MAKE SURE THE MAGNETO IS GROUNDED BEFORE INSTALLING  THE PROPELLER OR CONNECTING EXTERNAL POWER.                NOTE: McCauley recommends that propeller mounting nuts (if applicable) be replaced at each  propeller installation, whenever possible. However, nuts may be reused providing the threads are in good condition and the locking material prevents turning of the nut on the  stud by hand. Propeller mounting bolts must be magnetic particle inspected in accordance  with ASTM E-1444 or replaced whenever the propeller is removed from the engine.                NOTE: The aircraft maintenance manual or STC installation instructions should always be  consulted for any specialized procedures applicable to a specific aircraft. Various spinner arrangements not manufactured by McCauley may be used which require additional procedures. (1) Make sure the mating surfaces of t
Read more