Test 2: Dynamic prop balance

If a prop blade has leading edge damage 0.050 deep. How long should the repair be overall when complete

0.50 long (10x)

Which of the following defects is cause for rejection of wood propellers

An oversize hub or bolthole, or elongated boltholes

Grease used in aircraft propellers reduces the frictional resistance of moving parts and is easily molded into any form under pressure. This statement defines

Antifriction and plasticity characteristics of grease

Which of the following methods is used to straighten a bent aluminum prop that is within repair limits?

Cold straightening

Name 3 important inspection items to be checked on seat belts during an annual inspection

Condition of webbing Attachment of bolts Operation of buckle Manufacture tags FAA approval tags

Propeller aerodynamic (thrust) imbalance can be largely eliminated by

Correct blade contouring and angle setting

Inspection of propeller blades by dye-penetrant inspection is accomplished to detect

Cracks or other defects

List the requirements of a proper aircraft maintenance statement to be recorded in the permanent aircraft records

Date Cert # Desctription Return to service signature Who performed the work

What inspection is performed to the repaired area after the leading edge damage has been removed?

Dye pen for cracks

How does a dynamic prop balance differ from static balance

Dynamic balance must be done w/ prop on plane with sensors while running engine

A final balance number of less than 1 is acceptable for prop balance

False

A lightning strike is considered a minor problem and can be returned to service by a powerplant mechanic

False

Locating the final balance weights with spinner attached screw is the recommended location

False

When servicing a McCauley prop with grease, the mechanic must pump in grease until it comes out of the seal

False

Name 3 of the 4 types of blade looseness checked when inspecting a constant speed prop

Fwd/aft play, inward/outward play, radial looseness (lead/lag)

Apparent engine roughness is often a result of propeller unbalance. The effect of an unbalanced propeller will usually be

Greater at high RPM

What are the units of measure used for dynamic prop balancing?

IPS inches per second

Which of the following statements concerning the installation of a new fixed pitch wood propeller is true?

Inspect the bolts for tightness after the first flight and again after the first 25 hours of flying

The purpose of permanently sealing and partially filling some models of McCauley propeller hubs with dyed oil is to

Make the location of cracks readily apparent

List the requirements of a proper aircraft inspection statement to be recorded in the permenant records

Name Airworthiness statement Tach time Date Cert # Signature

Is dynamic balancing a prop mandatory

No

Generally, unless otherwise specified by the manufacturer, repairs of nicks, scratches, gouges, etc. on aluminum propeller blades must be made

Parallel to the length of the blade

Which of the following determines oil and grease specifications for lubrication of propellers

Propeller manufacturers

When lubricating a Hartzell propeller blade with grease, to prevent damage to the blade seals, the service manual may recommend on some models to

Remove one of the 2 zerk fitting and grease the blade through the remaining fitting

Which of the following is used to correct horizontal unbalance of a wood propeller

Solder

If a flanged propeller shaft has dowel pins

The propeller can be installed in a given position

What type of imbalance will cause a two-blade propeller to have a persistent tendency to come to rest in a horizontal position (with the blades parallel to the ground) while being checked on a propeller balancing beam?

Vertical

What type of damage can be reduced by dynamic balancing a prop

Vibration, bearing wear, and lost parts

Name 3 important inspections to be performed on a constant speed prop during annual

Visual, Check for damage, leaking from hub, track and balance, and dye pen

it is important that nicks in aluminum alloy prop blades be repaired as soon as possible in order to

eliminate stress concentration points