Podcast
Questions and Answers
What is the primary purpose of locking devices in aircraft?
What is the primary purpose of locking devices in aircraft?
- To improve the aesthetics of the assembly
- To prevent nuts and bolts from loosening due to vibration (correct)
- To facilitate quick repairs
- To increase the weight of the component
Which type of self-locking nut is constructed without the need for additional safetying means?
Which type of self-locking nut is constructed without the need for additional safetying means?
- Fiber-lock type nut (correct)
- Castellated nut
- All-metal type nut (correct)
- Locking mechanism nut
What is the function of plain washers in aircraft repair?
What is the function of plain washers in aircraft repair?
- To increase surface area for heat dissipation
- To secure a nut in place against lateral movement
- To prevent vibration loosening
- To provide a smooth bearing surface and act as a shim (correct)
What is the characteristic feature of shakeproof lock washers?
What is the characteristic feature of shakeproof lock washers?
Which of the following is NOT a type of fastener mentioned for aircraft panel access?
Which of the following is NOT a type of fastener mentioned for aircraft panel access?
In what scenario would special washers be necessary during an aircraft repair?
In what scenario would special washers be necessary during an aircraft repair?
What distinguishes split pins from other locking methods?
What distinguishes split pins from other locking methods?
Why is it important to use plain washers under lock washers?
Why is it important to use plain washers under lock washers?
What is necessary to ensure safe movement of an aircraft on the ground?
What is necessary to ensure safe movement of an aircraft on the ground?
Which individuals are essential for the movement of an aircraft?
Which individuals are essential for the movement of an aircraft?
Which precaution is NOT required for safe aircraft ground running?
Which precaution is NOT required for safe aircraft ground running?
What is the minimum requirement for personnel during aircraft towing?
What is the minimum requirement for personnel during aircraft towing?
What should be ensured regarding rotors or propellers during aircraft ground operations?
What should be ensured regarding rotors or propellers during aircraft ground operations?
What is a critical consideration before moving an aircraft?
What is a critical consideration before moving an aircraft?
Which is a necessary requirement when preparing for aircraft ground running?
Which is a necessary requirement when preparing for aircraft ground running?
When should wheel chocks be available during aircraft operation?
When should wheel chocks be available during aircraft operation?
Why is water ineffective for extinguishing certain types of fires?
Why is water ineffective for extinguishing certain types of fires?
Which extinguishing agent is effective against combustion because it displaces oxygen?
Which extinguishing agent is effective against combustion because it displaces oxygen?
What is a disadvantage of using dry chemical extinguishers?
What is a disadvantage of using dry chemical extinguishers?
Which extinguishing agent is no longer approved due to its toxicity and potential to produce poisonous gas?
Which extinguishing agent is no longer approved due to its toxicity and potential to produce poisonous gas?
What requirement must portable fire extinguishers meet in aircraft crew and passenger compartments?
What requirement must portable fire extinguishers meet in aircraft crew and passenger compartments?
Why might methyl bromide (Halon 1001) not be used in aircraft?
Why might methyl bromide (Halon 1001) not be used in aircraft?
What is the consequence of using soda acid extinguishers in certain situations?
What is the consequence of using soda acid extinguishers in certain situations?
Which fire extinguishing agent chemically reacts with flames to extinguish fires?
Which fire extinguishing agent chemically reacts with flames to extinguish fires?
What is the primary purpose of housekeeping fire prevention methods in aircraft maintenance areas?
What is the primary purpose of housekeeping fire prevention methods in aircraft maintenance areas?
When cleaning up flammable liquid spills in aircraft environments, what is the recommended action?
When cleaning up flammable liquid spills in aircraft environments, what is the recommended action?
Why must oil and greases not be used on oxygen equipment in aircraft?
Why must oil and greases not be used on oxygen equipment in aircraft?
What is essential to observe when working near aircraft to prevent fire hazards?
What is essential to observe when working near aircraft to prevent fire hazards?
What should be done with rags that are impregnated with flammable fluids?
What should be done with rags that are impregnated with flammable fluids?
Before commencing work on an aircraft, what should a technician always consult?
Before commencing work on an aircraft, what should a technician always consult?
How are fire extinguishers generally activated in aircraft maintenance areas?
How are fire extinguishers generally activated in aircraft maintenance areas?
What must be strictly followed regarding oxygen systems in aircraft?
What must be strictly followed regarding oxygen systems in aircraft?
What is the primary reason for using a shadow board for handtools?
What is the primary reason for using a shadow board for handtools?
Which type of spanner is recommended to reduce slippage when tightening nuts or bolts?
Which type of spanner is recommended to reduce slippage when tightening nuts or bolts?
What should be done with punches that have mushroom heads?
What should be done with punches that have mushroom heads?
What must be ensured before using powered tools?
What must be ensured before using powered tools?
When using pliers to clip wire, what is the correct practice for deflection of the wire?
When using pliers to clip wire, what is the correct practice for deflection of the wire?
What is an essential feature of screwdrivers used for electrical work?
What is an essential feature of screwdrivers used for electrical work?
Which of the following practices is advised for using hammers?
Which of the following practices is advised for using hammers?
What is the best practice when using a spanner to tighten a bolt or nut?
What is the best practice when using a spanner to tighten a bolt or nut?
Study Notes
Locking Devices
- Locking devices prevent nuts and bolts from loosening due to vibrations in aircraft.
- Common locking methods include split pins, lock nuts, and wire-locking.
Self-Locking Nuts
- Self-locking nuts integrate safety features within their construction.
- Two types: all-metal and fibre-lock nuts require no additional safetying mechanisms.
Aircraft Washers
- Types: plain, lock, and special washers are used in aircraft repair.
- Plain washers act as shims and protect surfaces under lock washers.
- Lock washers use spring action to prevent nut loosening from vibration.
- Shakeproof lock washers feature tabs for securing nuts and bolts.
- Special washers are designed for bolts installed at angles or for alignment purposes.
Turn Lock Fasteners
- Known as quick-release or quick-action fasteners, facilitating easy access for inspections.
- Common types: Dzus, Camloc, and Airloc fasteners.
Split Pins (Cotter Pins)
- Used with castellated nuts designed for drilled bolts.
- Split pins must fit snugly in holes and are single-use.
- Rotor systems generally have specific locking procedures outlined in manufacturer manuals.
Movement of Aircraft
- Aircraft can be ground-handled or towed for servicing or flight.
- Locking devices must be in place according to manufacturer manuals.
- Wheel chocks should be available in case of brake failures.
- A minimum ground crew includes a qualified driver, cockpit operator, and wing-tips watchers.
Aircraft Ground Running
- Only qualified personnel may perform ground running of aircraft.
- Ground procedure manuals should guide practices and precautions.
General Precautions
- Ensure aircraft are on firm ground, free from foreign object debris (FOD).
- Ground support equipment must be away from the aircraft.
- Aircraft should face into the wind for optimal airflow.
- Main wheels must be chocked with the parking brake engaged.
- Warning against water on metal fires; alternative methods: CO, HALON, dry chemicals.
Aircraft Fire Extinguishers
- Built-in detection and extinguishing systems meet FAA, CAA, and DCA regulations.
- Portable extinguishers must be type-approved, suitable for specific fire risks, and minimize toxic hazards.
Extinguishing Agents Not Recommended
- Dry chemical extinguishers: Effective but leave residue harmful to visibility and equipment.
- Carbon tetrachloride (Halon 104): Toxic and no longer approved due to gas toxicity when heated.
- Soda acid and foam extenders can be both toxic and corrosive.
- Methyl bromide (Halon 1001): Highly toxic and corrosive to several metals.
- Chlorobromomethane (Halon 1011): Effective but also toxic.
Fire Fighting Appliances
- Local firefighting equipment requires knowledge of extinguisher locations and emergency exits.
- Fire prevention through efficient servicing and prompt first aid firefighting equipment use.
Aircraft Fire Hazards
- Flammable liquids such as fuels and hydraulic oils need immediate cleanup upon spillage.
- Extra precautions during defueling due to high fire risk.
Oxygen Systems
- High-pressure cylinders store oxygen and must be leak-free to prevent fire escalation.
- Oil and grease must never contact oxygen equipment.
Cleaning Materials
- Avoid accumulation of waste fluids; use closed metal containers for contaminated rags.
Naked Lights and Heat Sources
- Avoid naked flames and unsealed light sources around aircraft.
- Smoking prohibited near aircraft, hangers, and fuel zones.
Aircraft Fire Extinguishing Procedure
- Always refer to aircraft manuals before commencing work to ensure adherence to firefighting procedures.
Hand Tools
- Tools should be organized and easily checked using shadow boards.
- Strict rules for the use of hammers, screwdrivers, punches, and spanners to prevent accidents.
Powered Tools
- Ensure all safety guards are in place before use.
- Protective clothing is essential to avoid contact with moving parts.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz explores various locking devices used in aircraft to prevent nuts and bolts from loosening due to vibrations. It covers methods such as split pins, lock nuts, wire-locking, and the role of self-locking nuts in ensuring safety. Test your knowledge on these crucial components of aircraft maintenance!
