NEW
Font size
WorksheetsM9.8 Cat B
Total questions: 28
Worksheet time: 14mins
The SHEL model of human factors takes into account.
Software, hardware, environment and liveware.
Software, hardware, efficiency and liveware.
Software, hardware, environment and location.
What part of the SHEL model would the writing and interpretation of maintenance manuals fit into?
Hardware
Software
Environment
The 'error chain' theory refers to
a chain of errors within an organizations can be investigated, and similar errors prevented by determining a common link between them
a company is only as good as its weakest employee or employees, and removal of that/those employee from the chain should prevent errors.
errors are caused by a chain of linked events, and the breaking of one link in the chain will prevent the error
What part of the SHEL model would the aircraft design fit into?
Liveware
Hardware
Environment
Which part of the SHEL model is most difficult to protect from errors by 'designing out' or to 'work around'?
Liveware
Software
Environment
A violation in an aircraft maintenance procedure
is usually carried out with the best intentions from a genuine desire to 'get the job done'
is always considered an act of vandalism or sabotage
is always carried out to satisfy some personal need, often unrelated to the actual task
Which type of human error is easiest to correct?
Constant error
Reversible error
Variable error
In the 'slips, lapses and mistakes' definition of errors, forgetting to replace an engine cowling would be considered a
mistake
lapse
slip
In the 'slips, lapses and mistakes' definition of errors, a mistake would typically occur at the
storage (memory) stage
execution stage
planning stage
On a task that is complex, an engineer uses his own procedures due to pressure. This is legally termed
modification
initiative
violation
Visual inspection by an 'experienced' maintenance engineer is
knowledge and rule base behaviour
skill and knowledge based behaviour
skill and rule based behaviour
Troubleshooting is
rule based
skill based
knowledge based
A violation is
an unintentional error
a deliberate departure from the rules
an intentional act of sabotage
A mistake is
a deliberate departure from the rules
an intentional act of sabotage
an unintentional error
Whilst working on an aircraft a spanner placed on the wing surface is kicked off and subsequently falls into an open engine cowl, breaking off a sensor connector. This is an example of
a skill based error
Murphy's law
a punishable occurrence
An experienced engineer fits the wrong seal during a routine component change. This is
skill based
rule based
knowledge based
An engineer is working on a wing and kicks a spanner off into an engine cowl and breaks a sensor. This is
skill based
rule based
knowledge based
The difference between a mistake and a violation is
a mistake is less serious than a violation
a violation is not deliberate
a mistake is unintentional and a violation is deliberate
An experienced engineer is fitting a valve. A required seal is not fitted. What type of error is this?
Knowledge based
Rule based
Skill based
The hub of the SHEL model of human factors is
liveware
hardware
environment
A type 1 visual inspection error occurs when
a faulty item is missed
a good item is incorrectly identified as faulty
a duplicate inspection is not carried out
What is the difference between error and violation?
Violation is deliberate, error is not
Error is deliberate, violation is not
No difference
What is a latent failure?
A mistake that has already been made, but has not yet caused an accident
Receiving bad instruction from a manager who is out of touch with maintenance
A failure which could not have been predicted
What happens when you break the 'chain of error'?
Accident happens
Pilot submits report within 72 hours
Accident does not happen
If an engineer forgets to fit a seal to an engine drain plug, he or she has
made an error of commission
committed a violation
made an error of omission
An engineer is performing a task in less than ideal conditions in order to meet an operational deadline is
committed a routine error
committing a situational violation
making a rule based slip
An engineer who has developed their own method of performing a complex task
should be commended for their resourcefulness
is performing a rule based behaviour
is violating on a regular basis
Error tolerance in maintenance progress refers to
performance of tasks specifically designed to identify errors during a maintenance task
ability of a system to remain functional after a maintenance error
process of eliminating the contributing factors to error
