FINALS

• Visual Inspection - is required to determine the current condition of the aircraft and its components
• Should not be considered a part of the inspection itself:

  -        Servicing

  -        Lubrication
• The type of lubrication for each point is determined by the:

  -        type of bearing,

  -        bearing loads

  -        frequency and speed of the movement

  -        temperatures at the bearing

  -        materials that bear against one another
• Manufacturer – specify the frequency of lubrication for each lubrication point in an aircraft
• Lubrication - usually detailed and accomplished as a part of the continuous airworthiness maintenance program
• Cleanliness - is essential to good lubrication
• Servicing Aircraft - requires great care and attention to detail, regardless of the type of aircraft being serviced or the particular service being performed
• When to check the oil quantity for small aircraft:

  -        daily

  -        before flight
• Dipstick - is marked to show the maximum quantity of oil permitted in the engine sump or tank
• 13 U.S. quarts – capacity for each engine-oil sump
• When preflight shows less than 9 QUARTS, service with aviation-grade engine oil, SAE 30 below 40°F, SAE 50 above 40°F
• SAE 10W30 – the multi viscosity range that is recommended for improved starting and turbocharger controller operation in cold weather
• 50 hours – the recommended hours of operation to change the oil
• 4 months – the minimum months to change the oil if the aircraft is not operated frequently and has not operated for 50 hours
• Some manufacturers recommend changing the oil at intervals of not more than 90 days
• Things to do if the oil on the dipstick appears dirty when the oil quantity is being checked:

  -        the oil should be changed

  -        the screens cleaned

  -        the filter replaced
• Gas-Turbine Engines - generally use high-temperature synthetic lubricants conforming to MIL-L-7808 or MIL-L-23699
• Brake And Hydraulic Systems - must be serviced in accordance with the manufacturers’ instructions
• MIL-T-5542-B – a suitable lubricant for oxygen-system fittings
• Oxygen bottles (tanks) - should be serviced only with breathing oxygen
• In servicing batteries, it is most important to know whether a battery is a:

  -        lead-acid type

  -        alkaline type
• Tire Inflation – needs to be proper maintained to minimize tread wear and help prevent tire ruptures caused from running over sharp stones and ruts
• In addition to the services described in the foregoing paragraphs, it is necessary to service other items and systems from time to time as specified in the maintenance manual. Among these are the:

  -        oleo struts

  -        shimmy dampers

  -        bungee cylinders

  -        instrument filters

  -        fuel screens

  -        heaters

  -        other parts
• Cleaning - is not actually a part of the inspection process, it is an important step in preparing an aircraft for redelivery to the owner as well as being a good preventative-maintenance practice
• These materials will attack the plastic and may cause it to craze if you use it to clean plastic:

  -        gasoline

  -        benzine

  -        alcohol

  -        acetone

  -        anti-ice fluid

  -        lacquer thinner

  -        glass cleaner
• Petroleum Solvents - cause the deterioration of natural rubber and therefore should not be applied to rubber tires
• Isopropyl Alcohol - can be used to remove grime which cannot be removed using soap
• Interior Cleaning – a process about removing dust and loose dirt from the upholstery and carpet