Mixed Deck — All AME Topics Flashcards

Why are airport security regulations important?

Answer: To ensure safety by preventing security threats and unauthorized access

Airport security regulations are paramount for safeguarding passengers, staff, and aircraft from potential threats. These regulations establish rigorous protocols, such as passenger and baggage screenings and access controls, specifically designed to deter and detect security breaches. By preventing unauthorized access or the introduction of dangerous items, they maintain a secure environment essential for safe aviation operations.

An aircraft fuel vent system primarily prevents:

Answer: Tank structural collapse or rupture from pressure differential during altitude changes

Fuel vent systems equalize pressure between tanks and atmosphere, preventing the tank structure from being subjected to excessive differential pressure as altitude changes.

What is 'propeller slip'?

Answer: The difference between geometric pitch and effective pitch

Propeller slip is the difference between the theoretical geometric pitch and the actual effective pitch, representing the propeller's inefficiency due to airflow interaction.

Which of the following is considered the primary cause of wear and malfunction in the majority of aircraft hydraulic systems?

Answer: Particulate contamination in the fluid.

Particulate contamination is widely recognized as the leading cause of hydraulic system problems, accounting for a vast majority of failures. Tiny particles of metal, rubber, and dirt act as an abrasive, causing scoring and wear on the precision-machined surfaces of pumps, valves, and actuators, which leads to internal leakage, reduced efficiency, and eventual component failure.

During an inspection of an aluminum alloy landing gear component, a type of corrosion is found that proceeds along the grain boundaries of the metal. This form of corrosion is not readily visible on the surface in its early stages. What is this type of corrosion called?

Answer: Intergranular Corrosion

Intergranular corrosion is an attack along the grain boundaries of an alloy. It is often caused by improper heat treatment and can significantly weaken the material from within, making it difficult to detect visually until it becomes severe.

An experienced AME is performing a routine inspection that they have done hundreds of times. They begin to skip a few steps in the checklist, assuming everything is normal as it usually is. This behaviour is a primary example of which human factors error?

Answer: Complacency

Complacency is a significant human factor error where extensive experience on a repetitive task leads to a false sense of security. This causes the individual to become less vigilant and potentially skip crucial steps. The AME's assumption that everything is normal because it always has been is a classic sign of complacency.

Why is pilot training compliance crucial to aviation safety?

Answer: To ensure pilots meet safety standards and are qualified for safe flight operations

Pilot training compliance is fundamental to aviation safety because it ensures that pilots possess the necessary knowledge, skills, and experience to operate aircraft safely and proficiently. Regulatory bodies set stringent standards for initial training, certification, and recurrent checks to ensure pilots are competent in all aspects of flight, including emergency procedures. This rigorous adherence to training protocols minimizes human error and significantly contributes to the overall safety of flights.

Why is it important to follow repair manuals during aircraft repairs?

Answer: To ensure the repair is done safely and in accordance with manufacturer guidelines

Repair manuals contain detailed, step-by-step instructions, specifications, and warnings provided by the aircraft manufacturer. Adhering to these manuals during repairs is crucial to ensure that every procedure is performed correctly, safely, and to the exact standards required for airworthiness. Deviating from these guidelines can compromise the aircraft's structural integrity, operational reliability, and overall safety, potentially leading to catastrophic failures.

Which of the following is the BEST example of an 'error-trapping' technique in aircraft maintenance?

Answer: An independent inspection performed by a second qualified AME.

Error-trapping involves implementing a specific check or process designed to catch an error before it has consequences. An independent inspection is a classic example, as its sole purpose is to verify the work of the first AME and 'trap' any potential errors. While checklists and managing fatigue are important for error prevention, the independent check is a direct trapping mechanism.

What is the function of an aircraft troubleshooting checklist?

Answer: To provide a systematic approach to diagnosing and fixing problems

An aircraft troubleshooting checklist serves as a structured guide for maintenance technicians, outlining a logical sequence of steps to diagnose and resolve system malfunctions. It ensures that no critical steps are missed, promoting thoroughness and consistency in the troubleshooting process. This systematic approach helps in efficiently identifying the root cause of a problem, leading to accurate and effective repairs while minimizing diagnostic errors.

What is the purpose of a fuel jettison (fuel dump) system on large transport aircraft?

Answer: To rapidly reduce aircraft weight to maximum landing weight in an emergency

Fuel jettison systems allow aircraft to rapidly dump fuel overboard to reduce gross weight to the maximum allowable landing weight when an emergency landing is required shortly after takeoff.

What is the purpose of using diagnostic tools during troubleshooting?

Answer: To help identify and analyze faults in aircraft systems

Diagnostic tools are specialized equipment designed to interface with aircraft systems to read data, interpret error codes, and perform system checks. Their purpose is to provide technicians with precise information about the health and performance of various components, helping to pinpoint the exact location and nature of a fault. This detailed analysis significantly reduces troubleshooting time and ensures accurate problem identification, leading to more effective repairs.

What is 'blade angle' in propeller terminology?

Answer: The angle between the blade chord line and the plane of rotation

Blade angle (pitch angle) is measured between the blade chord line and the plane of rotation, determining how much air is deflected with each revolution.

An AME is troubleshooting an aircraft hydraulic system and observes that the system pressure fluctuates rapidly and excessively when a component is operated. The pump is known to be in good condition. What is the most likely cause of this issue?

Answer: The accumulator has lost its nitrogen pre-charge.

The primary function of an accumulator is to dampen pressure surges and supplement pump flow. If the nitrogen pre-charge is lost, the accumulator's diaphragm or piston has no gaseous 'cushion' to absorb pressure spikes from pump operation and component actuation, leading to rapid and excessive pressure fluctuations.

During a routine inspection of a 24-volt lead-acid battery, an AME notices a significant difference in specific gravity readings between individual cells (e.g., one cell is 1.275 while another is 1.220). What is the most appropriate action?

Answer: Replace the battery as it is likely nearing the end of its service life.

A specific gravity difference of 0.050 or more between cells in a lead-acid battery indicates that the battery is approaching the end of its useful life and should be considered for replacement. Topping off with water or simply recharging will not fix the underlying issue of a failing cell. Adding acid is never the correct procedure for adjusting specific gravity in the field.

How does non-destructive testing contribute to aircraft maintenance?

Answer: It detects internal and external damage without damaging the aircraft

Non-destructive testing (NDT) is a vital aspect of aircraft maintenance because it allows technicians to detect internal and external damage without causing harm to the aircraft structure or components. Techniques like ultrasonic testing or X-rays can reveal hidden flaws such as cracks, corrosion, or delamination. This method ensures structural integrity is maintained without costly disassembly or damage.

An AME is performing a visual inspection on a section of aluminum alloy aircraft skin and observes small, white or gray powdery deposits. This is indicative of which type of corrosion?

Answer: Surface corrosion

Surface corrosion is the most common type of corrosion on aluminum and magnesium alloys. It is characterized by a uniform attack on the surface, which first appears as a general dulling or etching of the surface, and then progresses to form white or gray powdery deposits.

In a modern Flight Management System (FMS), what is the primary source of real-time, high-accuracy position information used to continuously update and correct the aircraft's calculated position?

Answer: Global Positioning System (GPS)

While the FMS uses a blend of sensors for position determination, the Global Positioning System (GPS) is the primary source for accurate, continuous, and global position updating. The Inertial Reference System (IRS) calculates position but is subject to drift over time and relies on updates from GPS to maintain its accuracy.

In accordance with 14 CFR Part 25, if a fuse is essential for safety in flight and is accessible to the flight crew, what is the minimum number of spare fuses that must be carried on board?

Answer: At least 50% of the number of fuses of each required rating.

14 CFR § 25.1357(d) states: "Where fuses are used, there must be spare fuses for use in flight equal to at least 50% of the number of fuses of each rating required for complete circuit protection." This regulation ensures that sufficient spares are available for critical systems.

What does TDC stand for as used in reciprocating engine terminology?

Answer: Top Dead Center

TDC (Top Dead Center) is the piston position at its highest point in the cylinder bore, marking the boundary between the compression and power strokes.