No Slide Titleaeml.tech.purdue.edu/powerplantimages/2… · PPT file · Web view ·...
Transcript of No Slide Titleaeml.tech.purdue.edu/powerplantimages/2… · PPT file · Web view ·...
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Receiving Inspection
• This is the inspection of the engine as it is removed from the aircraft and received at the overhaul site
• The purpose of the receiving inspection is to begin to detect engine defects or required maintenance and to schedule the overhaul process
• Look at the history of the engine as recorded in the logbook - hours, repairs, routine service, etc…..
• Perform a conformity inspection to reveal unapproved accessories
• Review the applicable AD records to determine which AD’s are required during overhaul
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Receiving Inspection / Disassembly
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Receiving Inspection
• Review service bulletins • Review the overhaul manual and parts manual• In 370 lab you will also review the study guide• Perform a visual inspection to detect obvious
external defects . Perform this inspection prior to cleaning the engine. Look at paint condition, signs of heat damage, fretting, and oil leaks.
• Make an inventory of all extra parts received with the engine such as baffles, fittings, or ignition parts, so that nothing is lost
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Regulations Governing Overhaul
• Time Before Overhaul ( TBO )• The manufacturer determines the recommended
number of hours that an engine may be operated before it is overhauled
• Each engine model has a different TBO and they range from around 600 to 2400 hours
• All engines wear, build-up sludge, form deposits, crack, and parts fail that cause them to require overhaul
• Privately owned aircraft (Part 91) may exceed TBO if the engine shows no signs of deteriorated performance
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Regulations Governing Overhaul• Rebuilt is the term used to describe an engine that
has been disassembled, inspected, repaired, reassembled, and tested utilizing new tolerances
• Overhauled is the term to describe an engine that has been disassembled, inspected, repaired, reassembled, and tested utilizing serviceable tolerances
• An engine equipped with an integral supercharger that has its case halves separated is a major repair and must be approved by an IA
• An engine equipped with other than spur type propellor reduction gearing, that has its case halves seperated, is also a major repair
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Regulations Governing Overhaul
• Any special repairs involving welding, plating,metalizing, or other nonstandard procedures is also a major repair