Task - Physical Work


Physical Work - Aircraft maintenance is a relatively active occupation.  Regardless of the job being done, most tasks tend to have elements of fine motor control, requiring
precision, as well as activities requiring strength and gross manipulation.
Biomechanical perspective, human body is a series of physical links (bones) connected at certain points (joints) that allow various movements. 
Muscles provide the motive force for all movements, both fine and gross.
The force that can be applied in any given posture is dependent on the strength available from muscles and the mechanical advantage provided by the relative positions of the load, muscle connections, and joints.
Ease of maintainability -It is important that maintenance tasks on aircraft are within the physical limitations of aircraft maintenance engineers.
Physical work over a period of time will result in fatigue. This is normally not a problem if there is adequate rest and recovery time between work periods. It can, however, become a problem if the body is not allowed to recover, possibly leading to illness or injuries. Hence, engineers should try to take their allocated breaks.
Musculoskeletal system - the human body is a series of physical links (bones) connected at certain points (joints) that allow various movements. Muscles provide the motive force for all movements, both fine and gross. This is known as the musculoskeletal system. The force that can be applied in any given posture is dependent on the strength available from muscles and the mechanical advantage provided by the relative positions of the load, muscle connections, and joints.
Designed for ease of maintainability- It is important that maintenance tasks on aircraft are within the physical limitations of aircraft maintenance engineers. Boeing use a computerised tool, based on human performance data (body sizes, strengths, leverages, pivots, etc.), to ensure that modern aircraft are designed such that the majority of maintenance engineers will be able to access aircraft equipment, apply the necessary strength to loosen or tighten objects, etc.
Fatigue - physical work over a period of time will result in fatigue. 
This is normally not a problem if there is adequate rest and recovery time between work periods. It can, however, become a problem if the body is not allowed to recover, possibly leading to illness or injuries. Hence, engineers should try to take their allocated breaks.
Missing a break in an effort to get a job done within a certain time frame can be counterproductive, as fatigue diminishes motor skills, perception, awareness and
standards. As a consequence, work may slow and mistakes may occur that need to be rectified.
Osteology -Scientific study of bones.

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