Maintenance rules quiz: Autumn 2025-26

1. A LAME completes maintenance on an aircraft with a MTOW of 4,500 kg. The work was carried out by another person under the LAME’s direction. Which statement correctly reflects the LAME’s obligations under CAR 42U and 42Z?
   1. the LAME may certify the maintenance only if they personally carried out all tasks
   2. the LAME may certify the maintenance provided they are authorised and satisfied the work complies with applicable airworthiness requirements
   3. the LAME may certify the maintenance only if CASA has approved the delegation
   4. the LAME may not certify maintenance performed by another person
2. Maintenance affecting flight controls is completed on an aircraft below 5,700 kg. A minor unrelated defect is identified that is permitted to be deferred under the aircraft’s approved maintenance data. What is the correct regulatory action under CAR 42V?
   1. issue a maintenance release only after all defects are rectified
   2. defer the defect verbally with the pilot and issue the maintenance release
   3. record and defer the defect in accordance with approved data and issue the maintenance release.
   4. ground the aircraft until CASA approval is obtained
3. Which of the following statements about a maintenance release issued under CAR 43 for an aircraft below 5,700 kg is correct?
   1. it certifies the aircraft is defect-free
   2. it certifies all scheduled maintenance has been completed for the next 100 hours
   3. it certifies that maintenance affecting airworthiness has been completed in accordance with applicable requirements
   4. it certifies the aircraft has been inspected and approved by CASA
4. An aircraft below 5,700 kg has completed maintenance and a maintenance release has been issued. A deferred defect is listed in accordance with approved data. Under CAR 42ZB, when may the aircraft be operated?
   1. only if the deferred defect does not affect safety and is recorded on the maintenance release
   2. only if the pilot in command accepts the defect in writing
   3. only after CASA approval of the deferred defect
   4. only for private operations
5. Which combination of actions best satisfies the intent of CAR 42U–42ZB (Division 4) with respect to continued airworthiness?
   1. maintenance certification, CASA oversight and pilot acceptance of defects
   2. authorised maintenance, correct certification, defect control and issue of a maintenance release
   3. approved maintenance data, scheduled inspections and test flights
   4. registered operator control and LAME supervision only
6. The US FAA produces AC43.13-1B and FAA AC43.13-2B Acceptable Methods, Techniques and Practices (for Inspections and Repairs, and Alterations respectively). In Australia:
   1. AC43.13-1B/2B can be used on aircraft under 5,700 kg even if the manufacturer specifically excludes its use
   2. AC43.13-1B/2B can be used on pressurised and non-pressurised aircraft under 5,700 kg
   3. minor repairs appropriately carried out under AC43.13-1B/2B require CASR subpart 21.M approval.
   4.  minor repairs appropriately carried out under AC43.13-1B/2B do not require CASR subpart 21.M approval
7. Which of the following is correct about composite structures?
   1. composite structures are 2 or more materials that are combined to form a much stronger structure than the original material itself
   2. composite structures are only manufactured from non-metallic material
   3. composite structures always have a matrix in liquid form
   4. the concept of composite materials in aviation and outside aviation is relatively new
8. What is the main advantage of using composite structures compared to aluminium structures in aircraft?
   1. they have a high strength-to-weight ratio
   2. they are easier to detect damage visually
   3. they have unlimited fatigue life
   4. they have increased electrical conductivity
9. Two types of fiberglass cloth are commonly used in composite structures or repairs. Which of the following is correct?
   1. e-glass cloth is normally lighter than most other fiberglass materials
   2. s-glass cloth is not used in non-structural applications
   3. e-glass is not used for reinforcement
   4. s-glass is used where a very high tensile strength is needed
10. In aircraft composite structures, the primary function of the matrix material (e.g. resin) is to:
    1. carry the majority of the tensile load
    2. protect the fibres and transfer loads between them
    3. prevent electrical conductivity
    4. increase fibre stiffness
11. Which inspection method is most suitable for detecting internal delamination in composite aircraft structures?
    1. visual inspection
    2. dye penetrant inspection
    3. eddy current inspection
    4. ultrasonic inspection
12. An advantage of borescope inspection over a differential compression test when assessing piston engine cylinder condition is that a borescope inspection:
    1. provides a quantitative measurement of cylinder sealing
    2. can be performed without removing spark plugs
    3. allows direct visual assessment of internal cylinder components
    4. cannot identify leaks in the induction and exhaust systems
13. During a differential compression test on a piston aircraft engine, a low cylinder reading accompanied by air noise from the exhaust outlet indicates leakage past the:
    1. piston rings
    2. exhaust valve
    3. intake valve
    4. cylinder head gasket
14. When inspecting valves with a borescope, how is a burnt exhaust valve most likely to appear as?
    1. a uniformly coloured valve face
    2. light surface pitting around the edge
    3.  a localised area of erosion or missing material on the valve margin
    4. a polished valve seat with no carbon deposits

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