MODULE 2

• PREOILING - required to  prevent engine bearing failure on the initial start
• FUEL SYSTEM BLEEDING - a process about purging the fuel system to bleed air bubbles from the fuel lines and pumps and to remove any preservative oil from the fuel system before attempting to start a newly installed engine
• Engine Cowl FLaps - regulate the passage of cooling air through the engine compartment
• COWL FLAP RIGGING - a process about regulating the passage of cooling air through the engine compartment
• Manufacturer’s Overhaul Manual - provides instruction and a run-in schedule for newly overhauled engine
• Run-in Test - permit newly installed parts to burnish or “wear in”, piston rings to seat against cylinder walls and valves to become seated
• Run-in Test - makes it possible to observe engine operations under controlled conditions and to ensure proper operation from idle to 100 percent power.
• Power Check - time during which an engine is operated at full power
• Power Check - purpose of this check is to ensure satisfactory performance. 
• Oil Consumption Run - is made at the end of the test in the following manner: Record the oil temperature
• POST-RUN CHECKS AND ADJUSTMENTS - happens after the initial ground run and flight test
• ENGINE PRESERVATION - a process where an engine that is going to be put in storage or not operated for more than a month should be preserved and protected to prevent corrosion
• The primary purpose of engine and engine accessory preservation procedures is to prevent CORROSION
• Corrosion - occurs whenever a metal such as steel, iron, or aluminum combines with oxygen to form an oxide
• Dehydrating agents - often referred to as desiccants, are used in engine preservation because they remove moisture from the local atmosphere
• Common Silica Gel - an, ideal desiccant because it does not dissolve when saturated. 
• Shipping Container - where the preserved engines should be protected
• Available for horizontal mounting or vertical mounting of the engine:

  • Wooden Crates
  • Metal Containers
• INSPECTION OF STORED ENGINES - a process where most maintenance shops inspect engines in storage according to a schedule
• Humidity indicators are normally inspected every 30 days. If an engine is protected with a sealed envelope, the inspection period may be extended to every 90 days. Under normal conditions, the humidity indicator inside a metal container is inspected every 180 days
• ENGINE DEPRESERVATION - a process where the preserved engines must undergo de-preservation before being returned to service
• ACCESSORY DEPRESERVATION - a process where the engine performance depends, in part, on the condition of the engine accessories