ACI 2 (Mod 1&2 - Finals)

Question 1

Systematic troubleshooting approach according to Airbus

Answer 1

• Identify the source of vibration
• Use onboard sensors and maintenance data for diagnosis
• Analyze vibration patterns

Question 2

Corrective actions according to Airbus

Answer 2

• Component inspections
• Adjusting and replacing affected parts

Question 3

When performing aircraft maintenance it’s important to always verify
the

Answer 3

OEM’s recommendation for sensor and mount installation

Question 4

Who will specify when maintenance should be conducted

Answer 4

Manufacturer

Question 5

Who issued directives that relate to engine safety

Answer 5

FAA

Question 6

Measures acceleration forces, commonly used for engine and airframe monitoring

Answer 6

Accelerometers

Question 7

Measures the velocity of an object or fluid using various methods

Answer 7

Velocimeters

Question 8

2 methods/approach used in velocimeters

Answer 8

• Doppler effect
• Laser velocimetry

Question 9

In digital vibration monitoring systems where do sensors send data

Answer 9

Central processing unit

Question 10

Vibration levels are shown on digital displays, often integrated into the cockpit’s ____

Answer 10

Multi-function display

Question 11

is a vibration analysis and balancing tool that rapidly and accurately acquires and analyzes aircraft and engine vibration data.

Answer 11

Honeywell Chadwick-Helmuth’s Vibrex™ 2000 Plus (V2K+)

Question 12

are critical for monitoring and managing the levels of various fluids essential to an aircraft’s operation.

Answer 12

Fluid quantity system

Question 13

Types of fluids monitored

Answer 13

• Fuel
• Oil
• Hydraulic fluid
• Water

Question 14

The most critical fluid, requiring precise measurement to ensure sufficient supply for the entire flight.

Answer 14

Fuel

Question 15

Used for engine lubrication and cooling.

Answer 15

Oil

Question 16

Powers various aircraft systems, including landing gear, brakes, and flight controls.

Answer 16

Hydraulic fluid

Question 17

Used in lavatory systems and potable water supply.

Answer 17

Water

Question 18

• Used primarily for fuel measurement
• Consist of two conductive plates separated by a dielectric material (fuel).
• The capacitance changes with the fluid level, altering the electrical signal proportional to the fuel quantity.

Answer 18

Capacitance probes

Question 19

What principle does a gyroscope use

Answer 19

conservation of angular momentum

Question 19

• Common in oil and hydraulic systems.
• Use a float mechanism connected to a variable resistor.
• As the fluid level changes, the float moves, adjusting the resistance and changing the signal sent to the indicator.

Answer 19

Resistive sensors

Question 19

• Use sound waves to measure fluid levels.
• Transmit ultrasonic pulses and measure the time it takes for the echoes to return.
• Suitable for various fluid types, including fuel and water.

Answer 19

Ultrasonic sensors

Question 20

a device with a spinning disc or wheel mechanism that harnesses the principle of conservation of angular momentum

Answer 20

gyroscope

Question 21

the tendency for the spin of a system to remain constant unless subjected to external torque.

Answer 21

principle of conservation of angular momentum

Question 22

Instruments that is considered to be a gyro instrument

Answer 22

• Turn indicator
• Heading indicator
• Attitude indicator

Question 23

also known as the turn and slip indicator is a variant that are essentially two aircraft flight instruments in one device.

Answer 23

Turn indicator

Question 24

What does the turn indicator indicate

Answer 24

- rate of turn - skid or slip

Question 25

also known as the directional gyro, or DG displays the aircraft's heading in compass points, and with respect to magnetic north when set with a compass.

Answer 25

Heading indicator

Question 26

also known as an artificial horizon shows the aircraft's relation to the horizon.

Answer 26

Attitude indicator

Question 27

Two things that an attitude indicator is able to display

Answer 27

- roll - pitch

Question 28

use tiny vibrating structures to measure angular velocity.

Answer 28

Micro-Electro-Mechanical Systems gyroscopes

Question 29

Use light traveling through optical fibers to detect rotation.

Answer 29

Fiber Optic Gyroscopes (FOGs)

Question 30

Utilize laser beams in a ring-shaped cavity to measure rotational motion.

Answer 30

Ring Laser Gyroscopes (RLGs)

Question 31

focuses on providing three-dimensional orientation by processing data from gyroscopes, accelerometers, and sometimes magnetometers. It gives precise attitude (pitch, roll, and yaw) and heading information to the PFD.

Answer 31

Attitude and Heading Reference System (AHRS)

Question 32

Advantages of Digital Gyroscopic Instruments

Answer 32

- High precision in measuring rotational movement - Less prone to mechanical wear and tear - Easily integrated with other digital avionics systems - Lower maintenance requirements compared to traditional mechanical gyroscopes