Maintenance quiz

For each item, chose the most appropriate response.

1. The CASA Maintenance Schedule (Schedule 5 of CAR) can be elected for the maintenance of class B turbine aircraft:

1. providing it is not a twin-engine aircraft
2. providing the aircraft is a helicopter
3. providing you incorporate the engine manufacturer’s instructions for continuing airworthiness of the engine
4. providing you incorporate the aircraft manufacturer’s instructions for continuing airworthiness

2. When assembled, adjusted, repaired, modified or replaced in the course of carrying out maintenance, which of the following systems is required to be inspected by the person who carried out the assembly as well as by an independent other person who is appropriately qualified?

1. any part of the engine control system
2. any part of the flight control system
3. optional dual controls only, connected without tools
4. a and b

3. The period a maintenance release is issued for is:

1. the time in service or calendar period specified in the logbook statement
2. the periods specified in the operator’s approved system of maintenance
3. the periods specified in the operator’s maintenance control manual
4. any of the above if applicable

4. Maintenance listed in Part 1 of Schedule 8 of CAR can be carried out by:

1. B1 or B2 Part 66 licence holders who do not hold the type rating for the aircraft
2. pilots, providing the task is signed for by a B1 licence holder on the maintenance release
3. pilots, providing the task does not require tooling that requires calibration
4. pilots, providing the task is also listed in the aircraft’s flight manual as a pilot task

5. The phenomena of ‘ground resonance’ in helicopters can only happen in helicopters with:

1. two-blade systems with semi-rigid underslung heads
2. fully articulated rotor systems
3. wooden rotor blades
4. landing gear that has oleo shock struts

6. In piston engines, ‘morning sickness’ is a term used to describe the following:

1. the ability of the engine to achieve full power at the beginning of the day
2. rough running for a period of time after starting up at anytime of the day
3. rough running caused by overly rich idle mixture
4. rough running caused by the exhaust and
   inlet valves sticking intermittently in their respective guides

7. A conversion process applied to aluminium to help prevent corrosion is:

1. Twin-pack epoxy primer
2. selenious acid treatment
3. chromic acid (alodine) treatment
4. etch primer

8. In most single-engine Cessna fuel systems, the overboard vent has a one-way check valve allowing air to enter the tank and replace the fuel being used, to stop a vacuum in the tank. The valve also incorporates a minute orifice which allows fuel from the tank to vent overboard. This ensures:

1. the tank can be filled to full capacity without fuel leaking from the vent
2. the fuel is not lost when the aircraft is parked on a slope
3. the tank is not pressurised by expanding fuel
4. both left and right tanks remain equal

9. When bending sheet metal, a bend radius is required by applying a formula. This is to ensure:

1. no stress cracks are produced
2. the bend is as close to 90˚as possible
3. a smooth radius is produced
4. a uniform stress level is produced along the bend

10. If the bottom spark plugs in a horizontally opposed piston engine become oil-fouled on a regular basis, the most likely cause would be:

1. the piston rings have become worn or lost their tension
2. the valve guides are worn allowing oil to pool at the bottom of the cylinder
3. the cylinder has low compression
4. the oil control ring is worn or cracked

11. Light piston-engine aircraft that usually fly in the flight levels, usually have pressurised magnetos.

1. they are pressurised from air taken from the turbo charger upper deck pressure line
2. they increase ozone production within the magnetos
3. they are pressurised using air directly from the turbocharger discharge.
4. The pressurised air to the magneto is constant and does not fluctuate with changes in manifold pressure

12. Skin mapping is the process of finding an interference-free area on the skin of an aircraft. This process:

1. locates where large current loads are present in the aircraft
2. ensures the mounting of an antenna such as for GPS suffers minimum effects of interference
3. is effective on all skin types such as metal, composite and fabric
4. only needs to be carried out on high-speed aircraft that generate a lot of static interference

13. When carrying out maintenance on radomes:

1. metallic-based paint and undercoats can be used
2. chemical strippers can be used to remove paint as they will not affect the resins in construction of the radome
3. some solvents can be used to clean the radome during repair
4. plastic protective nose caps should not be installed unless approved by the manufacturer

14. A helicopter attempting to hover at high altitude (in or out of ground effect) slowly rotates around the vertical access even though full anti-torque pedal is applied to stop the turn. This is most probably caused because:

1. a high-altitude tail rotor system has not been fitted
2. the rigging of the pitch of the tail rotor blades is not correct
3. the tail rotor is less effective in the thin atmosphere than at lower altitudes
4. the engine produces lower torque at higher altitudes, leading to all flight controls including the tail rotor being less effective

Answers:

1. (c)
2. (b)
3. (d)
4. (a)
5. (b)
6. (d)
7. (c)
8. (c)
9. (a)
10. (d)
11. (a)
12. (b)
13. (d)
14. (c)