AD 2/3

To allow comparison with MIMs serviceability limits during borescoping, you should record what information?

Cleaning the engine compressor by water washing is required before any borescope inspection so sulfidation does not hide damage.
True False

Which program defines the engine repair capabilities of an AIMD power plants section?

Which condition determines the different maintenance actions for specific engines?

What degree of gas turbine engine repair, if any, is the same as complete engine repair (CER)?

Which is the a purpose for cleaning engine parts?

Remove sulfidation from turbine blades?
prepare surface for repair?
Permit a thorough inspection?

The selection of cleaning materials and processes is determined by the degree of cleanliness required and nature of soil only.
True False

Which of the following practices should you follow when you steam cleaning parts?

avoid heat buildup?
thoroughly dry all parts after cleaning?
apply a corrosion prevention compound?

What cleaning process would you use to remove paint and rust?

Cleaning magnesium and steel parts in the same cleaning tanks could cause what problem?

Provided there is no indication of pieces breaking away, cracks are allowed without repair on what type of vane?

When inspecting combustion liners, what is the maximum allowable number of air hole cracks per section (0.125 inch or less)?

Burned combustion liners may be left in service provided the burn is NOT in which area?

Cracks in the combustion chamber support may be repaired using what method?

Operating turbine blades are more easily damaged than compressor blades because turbine blades operate under what extreme condition?

High-temp corrosion known as sulfidation is caused the interaction of what chemical compounds and elements?

Sulfidation has a more harmful effect on compression blades than on turbine blades.
True False

What condition is considered serious when the turbine rotor is sulfidated?

When checking for stress rupture cracks, you should check which sections on the turbine blades?

The leading edge of a first-stage turbine blade of an engine has stress rupture cracks. What condition is most likely the cause of the cracks?

What is NOT a reason to mark engine parts?

When using abrasive blasting you may use only the wet type.
True False

Temporary markings maintain identification of parts after a modification to that part.
True False

Marking of hot section components that are directly exposed to the gas path may be accomplished using what item?

Any temporary marking method that you use that leaves a heavy carbon deposit on hot section components may cause what type of corrosion?

What method of marking provides permanent markings?

Using engine stands and special fixtures to support the engine during disassembly and buildup provides what advantage?

Nuts and bolts used in the hot section of an engine are normally of what type?

When a complete replacement of the entire compressor case is accomplished, it is also necessary for you to replace the compressor rotor.
True False

What is elongation of the blade?

What is transfer of metal from one surface to another?

What is a bent blade of ragged edge?

What is the smooth repair into the surrounding contour?

When, if ever, is the straghtening of bowed compressor vanes permissible on the inner half of the blade?

When blending compressor vanes, you should use which of the following procedures?

What material should you use to polish a reworked area to make it feel like the original?

At what location is the code letter stamped on a blade?

Compressor stator vanes are blended to minimize stress that tends to concentrate in what areas?

When parts of the vane are damaged beyond maximum repair limits, they should be sent to what facility?

Damage to the tailing edge of the hollow vanes can be blended if what portion of teh weld seam remains after the repair?

What record would you refer to when classifying replacement turbine blades?

One hundred percent turbine blade replacement is allowable provided the pan weight of the replacement blades matches the original weight within what prescribed limit?

Hot spots found on the exhaust cone can be attributed to what condition?

Improper combustion liner flame control?
A malfunctioning fuel nozzle?
Engine operation at 100% rpm for long periods of time?

Engine adjustment is best accomplished during controlled operation of the engine. Manuals and procedures are established for the use of test facilities/test cells by what authority?

Operators of test facilities may be certified by one of three methods. Two of these methods are formal training at NADEP and on-site training provided by a NAESU engineer. What is the third method?

All test cell operators must hold a valid support equipment license that contains what info?

All certified test cell operators must hold a valid support equipment license. You should refer to what pub to determine training and licensing procedures?

Engine test cells are equipped to measure what parameters?

The enclosed test facility is capable of handling how many pounds of thrust during the engine performance test?

The enclosed test facility includes test equipment made up of a total of how many major assemblies?

For what reasons is the variable height stand used when testing an engine?

By what means is the interlock system started?

On the control board, when the toggle is raised, the switch is in what position?

The two mating pilot lights on the interlock system indicate the key switch position. What color light indicates CLOSED?

Improper sizing and positioning of the first-stage augmenter may result in what problems?

The fuel system of the enclosed test facility is interlocked to the basic interlock system, to the CO2 fire-extinguishing system, and to what other system?

Initial rotation of an engine during starting may be accomplished by an electrically operated starter motor or what other starting method?

For complete fire control coverage, the CO2 system is electrically linked to the interlock system. By what means is the system linked to the main fuel line valve of the engine fuel supply?

What is the primary purpose of the refrigeration system in the CO2 fire system?

Portable universal engine runup test systems may be used at any site that has what accomodations?

At the end of an engine test, the operator will record the engine coast-down time. What definition best defines coast-down time?

Shorter than normal coast-down time may be caused by what problem?