Maintenance quiz: Spring 2025

1. Under CAR 42ZC(4)(d), a private pilot may perform certain maintenance on the aircraft, only if:
   1. they have completed an aircraft maintenance course
   2. the aircraft is listed in Schedule 8 and they are authorised and competent to perform it
   3. the aircraft has fewer than 4 seats
   4. the aircraft is operated under an air operator certificate (AOC)
2. Which of the following is not a permitted task for a private pilot to carry out on a single-engine piston aircraft?:
   1. replacing a brake caliper
   2. replacing a spark plug
   3. replacing a landing light bulb
   4. replacing a main wheel tyre
3. On a large turbofan engine, why is it recommended to not start the engine crosswind?:
   1. it is important to ensure flow through the intake and into the engine during start to prevent the possibility of a turbine over-temp
   2. it is important to ensure flow through the intake and into the engine during startup to prevent the possibility of compressor stalls
   3. if start is initiated crosswind, the fan will be unloaded and may overspeed
   4. if the engine is started crosswind, the compressor will stall and the resulting popping sounds may disturb the passengers
4. To carry out approved pilot maintenance, the pilot must:
   1. have completed a training course on the task
   2. have carried out the task (or a similar task) within the previous 12 months
   3. have the skills and experience and be competent to do the task
   4. have a second person to assist
5. After completing permitted maintenance under Schedule 8, a private pilot must:
   1. notify CASA within 14 days
   2. make an entry in their pilot logbook
   3. make a certified entry in the maintenance logbook and/or sign the maintenance release
   4. have the work checked by a LAME
6. On a light turbine engine, what is the purpose of the engine bleed valve?:
   1. allows bleeding of hot air from the turbine for cabin heating
   2. allows bleeding of cool air from the compressor for cabin cooling
   3. to pressurise the cabin
   4. allows a small amount of air to bleed out of the compressor during start to avoid compressor stalls
7. Before carrying out maintenance unsupervised, a pilot must ensure:
   1. they are supervised by a LAME
   2. the aircraft is not on the CASA VH-register (light sport aircraft only)
   3. they are the sole owner of the aircraft
   4. they have approved data for the task
8. On a light free turbine engine (such as a RR 250 or PT6 Turboprop), what does the power lever do?:
   1. controls propeller pitch in the beta range
   2. controls the torque of the engine only
   3. operates only the fuel control unit (FCU)
   4. operates the FCU independently of other controls
9. A landing gear and door system may have hydraulically powered actuators, operating in a hostile environment. What can be done to aid longevity of the internal seals?:
   1. lubricate the piston shaft with light grease
   2. lubricate the piston shaft with the same hydraulic oil used internally in the system
   3. keep the piston shaft clean and lubricated
   4. disassemble and inspect the actuators more often than recommended by the manufacturer
10. Why are compressor washes often carried out on turbine engines?:
    1. to ensure the turbine blades are kept clean and therefore efficient
    2. to ensure the compressor blades do not build up a coating of contaminants that would disrupt the airflow, reducing the power of the engine
    3. required only if the aircraft is within 5 nautical miles of the ocean
    4. required daily in dusty conditions regardless of performance degradation
11. What is the primary purpose of deburring the edges of aluminium sheet and holes drilled in thin aluminium sheet?:
    1. for aesthetics
    2. to reduce injuries to the operator
    3. to reduce stress concentrations that may lead to cracks emanating from the area
    4. to prepare the metal for finishing such as an Alodine process or paint
12. What is a Texas deburring tool?:
    1. operated by a handheld drill that can deburr both sides of a hole in one action
    2. handheld device used for deburring holes drilled in aluminium sheet
    3. operated by a handheld drill that can deburr many holes of the same diameter very quickly
    4. operated only by a drill press that can deburr both sides of a hole
13. What are the characteristics of roller bearings and ball bearings used in aircraft?:
    1. a roller bearing cannot be used in applications that require a thrust face
    2. a roller bearing does not allow radial support
    3. a ball bearing is used where a thrust face is not required
    4. a ball or roller bearing can be used in any application that is not inside an engine
14. What does green dye on aircraft hardware indicate?:
    1. manufactured by a specific company that uses the colour to identify their particular product
    2. the hardware has been through a magnetic particle inspection
    3. the hardware is manufactured from stainless steel
    4. the hardware must only be used in low-torque applications

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