Engine2
What is the rear edge of an airfoil called?
Trailing Edge
Which type of airfoil does the airflow hit first after leaving the combustion chamber?
Vanes
You are conducting an additional instruction. Where do you document it´s execution? What else do you need to consider with regard to the WRB?
The execution of an additional instruction is documented in the List of Complaints (LoC). In addition, the traffic light must be deregistered in the WRB.
What does SPM stand for and what does it involve? Give at least two examples.
Standard Practices Manual: Description of handling with: tooling, torque wrenches, fasteners, consumables. Description of damage and permissible standard repairs.
What does the Mastercard include?
Includes the procedure for assembly/disassembly in chronological order
What type of an engine with a secondary-to-primary airflow ratio of 5:1 or higher called?
High Bypass Turbofan Engine
What does the abbreviation EGT stand for related to jet engines?
Exhaust Gas Temperature
What information is not included in the WRB? ( Name at least 3).
Assy Part Number
Standard Practices
IPC Documentation
Can I use a different assembly grease than the one specified in the Mastercard/Engine Manual? Justify your answer.
No, as this could increase/reduce friction accordingly, which in turn would affect the specified torque.
What is the function of outlet guide vanes?
Aligning the air flow in the axial direction.
guides the air to its appropriate route.
What is the function of the engine manual?
It describes the handling of engines, modules, and individual parts.
Which Accessories are mounted on an typical Accessory Gearbox?
IDG, Fuel Pump, Air/Oil Separator, Oil Pump
What does the abbrevation CS mean in the WRB Header Data?
Certifying Staff
What must be done before each shift and when changing the setpoint before using torque wrenches, and what must be taken into account?
The torque wrench must be checked for deviations between the torque set on the wrench and the value displayed on the testing device using an appropriate testing device. The torque wrench must also be checked for a valid calibration.
You are using an engine manual task. Identify the function code in the following task number and name what is behind these function code described? EM72-31-01-200-001
200 - inspection.
What is the connection between the N1 and N2 shafts called?
Aerodynamic coupling
Which type of combustion chamber is predominantly used in the engines we work on?
Annular combustion chamber
What does CAM stand for in the context of the WRB?
Customer Account Manager
You are required to create an entry in the LoC ( List of Complaints). What Requirements must be met when filling out the "Rectification" (Behebung) field?
The entry must be made in English. A description of what was done must be included and a reference to "Approved" or "Acceptable" Data must be included
Which rotor system drives the accesory gearbox?
Explain how the engine is started?
The engine is started with a pneumatic air starter. The starter is mounted o the accessory gearbox. The starter drives now via the gearbox the N2 rotor system. At a certain speed, the fuel and ignition are switched on and the engine runs.
How is the airflow distributed with a bypass ratio of 5:1 and a total flow of 600 kg/s?
100 kg/s through the core, 500 kg/s through the bypass
Explain in your own words the "Exp.OnWingTime" field in the WRB and what it means to you?
This refers to the "time" or "cycles" for which we must build the engine during the current shop visit. During assembly, I am only allowed to install LLP´s that have at least the required Exp.OnWingTIme.
Why are locking bolts/screw are loosen at the nut whenever possible?
Because turning the bolt/screw head can damage the mating surface.
What does LoC stand for and what is it used for?
List of complaints. For recording engine parts requiring repair or disassembly/assembly/repair activities.