Podcast
Questions and Answers
What is the purpose of indication systems in some aircraft installations?
What is the purpose of indication systems in some aircraft installations?
- To monitor the condition of fastener holes
- To prevent corrosion along seams of doors and panels
- To provide an alternative to positive locking mechanisms
- To ensure correct closure of panels and doors (correct)
Why is it particularly important to inspect panels and doors regularly?
Why is it particularly important to inspect panels and doors regularly?
- To maintain the aesthetic appearance of the aircraft
- To prevent corrosion along seams
- To prevent loss of panels in flight, which can cause engine destruction (correct)
- To prevent damage from excessive use
What is a common issue with panels and doors?
What is a common issue with panels and doors?
- Dissimilar metal corrosion in fastener holes
- Frame damage from excessive use
- Corrosion along seams
- All of the above (correct)
What is the purpose of protective covers on some switches?
What is the purpose of protective covers on some switches?
What indicates that a protective cover has been lifted on a fire extinguisher switch?
What indicates that a protective cover has been lifted on a fire extinguisher switch?
Why should corrosion along seams of doors and panels be investigated?
Why should corrosion along seams of doors and panels be investigated?
What type of tools may be required for inspecting certain doors and panels?
What type of tools may be required for inspecting certain doors and panels?
What is a common issue with fastener holes on panels and doors?
What is a common issue with fastener holes on panels and doors?
What should be ensured when inspecting aircraft fittings like nuts and bolts?
What should be ensured when inspecting aircraft fittings like nuts and bolts?
What should be identified and recorded during the inspection of rivets?
What should be identified and recorded during the inspection of rivets?
What should be checked during the inspection of filters, screens, and aircraft fluids?
What should be checked during the inspection of filters, screens, and aircraft fluids?
Why should rivets be drilled out during an inspection?
Why should rivets be drilled out during an inspection?
What should be ensured during the inspection of aircraft wiring?
What should be ensured during the inspection of aircraft wiring?
What should be inspected during the inspection of the powerplant?
What should be inspected during the inspection of the powerplant?
What should be checked during the inspection of aircraft fittings like nuts and bolts?
What should be checked during the inspection of aircraft fittings like nuts and bolts?
What is required for reinstalling rivets?
What is required for reinstalling rivets?
What is a precaution to avoid when working in a mercury-contaminated area?
What is a precaution to avoid when working in a mercury-contaminated area?
Why should drill bits used on mercury-contaminated areas be discarded?
Why should drill bits used on mercury-contaminated areas be discarded?
What should be done with protective clothing used in contaminated areas?
What should be done with protective clothing used in contaminated areas?
Why should you wash your hands thoroughly after contacting mercury?
Why should you wash your hands thoroughly after contacting mercury?
What should you do with vacuum cleaners used in the clean-up process?
What should you do with vacuum cleaners used in the clean-up process?
Why is it important to avoid eating, smoking, or blowing your nose without washing your hands?
Why is it important to avoid eating, smoking, or blowing your nose without washing your hands?
What should be done with shoes that may have come into contact with mercury?
What should be done with shoes that may have come into contact with mercury?
Why should stagnant air be avoided when working with mercury?
Why should stagnant air be avoided when working with mercury?
What is the primary indication of a pneumatic system's serviceability?
What is the primary indication of a pneumatic system's serviceability?
What is the likely cause of a slow pressure drop in the storage system between flights?
What is the likely cause of a slow pressure drop in the storage system between flights?
What is the purpose of using leak-detecting fluids?
What is the purpose of using leak-detecting fluids?
What is the primary method of checking landing gear oleo shock struts for correct inflation?
What is the primary method of checking landing gear oleo shock struts for correct inflation?
What is creep in the context of tyres?
What is creep in the context of tyres?
What is the consequence of creep on a tyre fitted with a tube?
What is the consequence of creep on a tyre fitted with a tube?
What determines the serviceability of a tyre?
What determines the serviceability of a tyre?
What is the purpose of re-treading a tyre?
What is the purpose of re-treading a tyre?
What is the recommended consistency of a paint remover for aircraft surfaces?
What is the recommended consistency of a paint remover for aircraft surfaces?
How should a water-rinseable paint remover be applied to the surface?
How should a water-rinseable paint remover be applied to the surface?
What is the purpose of allowing the paint remover to stand on the surface for a period of time?
What is the purpose of allowing the paint remover to stand on the surface for a period of time?
What is the effect of dissolved salts on the corrosion of aluminium surfaces?
What is the effect of dissolved salts on the corrosion of aluminium surfaces?
What is the characteristic of intergranular attack on aluminium alloys?
What is the characteristic of intergranular attack on aluminium alloys?
What is the first step in treating corrosion on aluminium surfaces?
What is the first step in treating corrosion on aluminium surfaces?
Why is it important to mask vulnerable areas when using paint removers?
Why is it important to mask vulnerable areas when using paint removers?
What is the result of penetrating pit-type corrosion on aluminium tubing?
What is the result of penetrating pit-type corrosion on aluminium tubing?
Study Notes
Pneumatic Systems
- Pneumatic systems require the same pressure at the start and end of a flight.
- Low pressure at the end of a flight may indicate a leak in the ducting or pipes.
- Pressure loss between flights may indicate a slow leak in the storage system.
Visual Inspection Techniques
Landing Gear
- Oleo shock struts can be checked for correct inflation by measuring their extension.
- Dimensions can indicate serviceability.
Inspecting Tyres
- Tyre serviceability is indicated by the depth of the groove in the tread.
- Defects that can affect tyres include cuts, blisters, creep, and low pressure.
- Creep is the movement of the tyre around the rim due to heavy braking action.
Inspecting Panels and Doors
- Panels and doors can be damaged by excessive use.
- Frames can become damaged where items are passed through them.
- Check for corrosion along seams of doors and panels.
Inspecting Emergency Systems / Equipment
- Protective covers may be used to prevent inadvertent operation of a switch.
- A broken wire or frangible device may indicate system operation.
Inspecting Bolts
- Check torque and tamper-proof paste on aircraft fittings like nuts and bolts.
- Identify any elongation, deformation, or corrosion on bearing surfaces.
Inspecting Rivets
- Check for corrosion around rivets and identify any gaps or looseness.
- Drilling out rivets may be necessary to determine corrosion extent.
Inspecting Filters, Screens and Fluids
- Check for cleanliness and contamination of filters, screens, and fluids.
- Ensure correct installation and replacement according to the maintenance manual.
Inspecting the Powerplant
- Inspect engine mounts for security and any evidence of movement or wear.
Corrosion on Metals and Alloys
Aluminium and Aluminium Alloys
- Corrosion attack on aluminium surfaces is evident through etching, pitting, or roughness.
- Three forms of attack are particularly serious: penetrating pit-type corrosion, stress corrosion cracking, and intergranular attack.
Treatment of Corrosion
- Mechanically or chemically remove corrosion products and inhibit residual materials.
- Restore permanent surface coatings to prevent corrosion damage and embrittlement.
Mercury Spill Precautions
- Avoid contact with contaminated surfaces.
- Wear protective clothing, gloves, and wing socks to avoid scratching metal surfaces.
- Clean and dispose of contaminated materials properly.
- Wash hands and exposed skin thoroughly after contacting mercury.
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