MOD 4 WHEELS, 7 FUEL PUMPS Flashcards
When inflating the wheel and tire assembly what must you watch for?
Beads seat against wheel flange
What should be done if a fusible plug has some deformation?
All fusible plugs must be replaced
A good way to clean bearings is by steam. TRUE OR FALSE
FALSE
Water stains on a bearing indicate what?
Intergranular corrosion
Brake disc drive keys are installed on what part?
Inboard wheel half
What should be done to wheel bolts after removal?
They should be inspected by magnetic particle inspection
The bearings normally used for wheel installations are the ball type. TRUE OR FALSE
FALSE
What must be done before mounting a tubeless tire?
Check for the word Tubeless on the sidewall
The red dot on the sidewall of the tire indicates what?
Tire’s light point
What are two common materials used in the construction of aircraft wheels?
Aluminium and Magnesium
Of the options below, which best describes the criteria used to classify aircraft tires? -Tube or tubeless, country of origin and speed rating
- Size, ply rating and tube requirements
- Price, weight and life expectancy
- Speed rating, colour and price
Size, ply rating and tube requirements
Where is the centrifugal boost pump located?
In the Fuel tank
How are vane style pumps plumbed into a system with the centrifugal type pump?
Series
What happens to excess pressure in a vane style pump? -Excess pressure off seats the bypass valve and routes the fluid back to the inlet. or -Vane pumps are not high pressure and don’t need pressure relief
Excess pressure off seats the bypass valve and routes the fluid back to the inlet.
What is the most popular auxiliary fuel pump in modern aircraft?
Centrifugal pump
The centrifugal fuel pump is?
electrically driven
Is the centrifugal boost pump a constant displacement pump?
no
Does the centrifugal boost pump separate vapor from the fuel?
yes
What direction does the cutaway fuel pump (E.D.P.) rotate as viewed from the drive end? (Use the model, it was cut away differently than the information in the workbook).
clockwise
What is the purpose of the by-pass valve on the cutaway EDP?
lets fluid by-pass the engine driven pump if it is not operating
Where is the relief valve located in relation to the by-pass valve on cutaway EDP?
the relief valve is part of the by-pass valve
What is the purpose of the aromatic diaphragm on the cutaway EDP pump? -to allow a combination of fuel and supercharger pressure to regulate pump output pressure or -increases the volumetric efficiency of the pump and works with the small holes in the pump liner
to allow a combination of fuel and supercharger pressure to regulate pump output pressure
Does the EDP fuel pump have seal drains?
yes
How are the EDP pump shaft bearings lubricated?
All the bearings are carbon bearings and do not need lubrication
