AM.III.B.S6

From the FAA library

• Aviation Maintenance Technician Handbook - Powerplantp. 6-20
  Chapter 6: Lubrication & Cooling Systems › Requirements for Turbine Engine Lubricants › Typical Wear Metals & Additives

  rate, then the operator can be notified quickly so repair or a recommendation of a specific maintenance procedure or inspection can be ordered. Oil analysis increases safety by identifying an engine problem before engine failure. It also saves money ... gears, valve train, cylinder walls, and pistons in some engines. • Chromium—primary sources are chromed parts (such as rings, liners, etc.) and some coolant additives. • Nickel—secondary indicator of wear from certain types of bearings, shafts, valves, and valve guides…

• Aviation Maintenance Technician Handbook - Powerplantp. 10-47
  Chapter 10: Engine Maintenance & Operation › Combustion Section Inspection › Marking Materials for Combustion Section Parts

  directly exposed to the engine’s gas path, such as turbine blades and discs, turbine vanes, and combustion chamber liners. A wax marking pencil may be used for parts that are not directly exposed to the gas path ... causing intergranular corrosion attack, that could result in a reduction in material strength and cracking. Figure 10-63. Combustion case inspection…

• Aviation Maintenance Technician Handbook - Powerplantp. 10-49
  Chapter 10: Engine Maintenance & Operation › Combustion Section Inspection › Inspection & Repair of Combustion Chambers

  dents are usually cause for rejecting the component. Inspect the covers, noting particularly the area around the fuel drain bosses for any pits or corrosion. When repairing the combustion chamber liner, the procedures given in the appropriate engine manufacturer…