Human Factors in Maintenance Flashcards

An AME is feeling rushed to complete a task before the end of their shift to avoid delaying a flight. This feeling is a classic example of which of the 'Dirty Dozen' in human factors?

Answer: Pressure

The scenario describes feeling rushed due to a deadline, which is a textbook example of the human factor 'Pressure.' Pressure can be internal (self-induced) or external (from the organization) and often leads to cutting corners or making mistakes. The other options are also part of the Dirty Dozen but do not fit the scenario as well.

In the context of the SHEL model for analyzing human factors, which component represents the rules, procedures, and manuals used by maintenance personnel?

Answer: Software

The SHEL model uses 'Software' to describe the non-physical aspects of the system, including rules, procedures, regulations, manuals, and checklists that govern the maintenance task. 'Hardware' refers to tools and equipment, 'Environment' is the physical and organizational setting, and 'Liveware' refers to the human element.

An experienced AME is performing a routine inspection that they have done hundreds of times. They begin to skip a few steps in the checklist, assuming everything is normal as it usually is. This behaviour is a primary example of which human factors error?

Answer: Complacency

Complacency is a significant human factor error where extensive experience on a repetitive task leads to a false sense of security. This causes the individual to become less vigilant and potentially skip crucial steps. The AME's assumption that everything is normal because it always has been is a classic sign of complacency.

Which of the following is the BEST example of an 'error-trapping' technique in aircraft maintenance?

Answer: An independent inspection performed by a second qualified AME.

Error-trapping involves implementing a specific check or process designed to catch an error before it has consequences. An independent inspection is a classic example, as its sole purpose is to verify the work of the first AME and 'trap' any potential errors. While checklists and managing fatigue are important for error prevention, the independent check is a direct trapping mechanism.

A maintenance engineer is working a long overnight shift and recognizes they are feeling the effects of fatigue. According to human factors principles, what is the most effective immediate countermeasure to mitigate the risk of error?

Answer: Informing their supervisor and taking a short, strategic nap if permitted.

While caffeine can provide a temporary mask for fatigue, it doesn't resolve the underlying physiological need for rest. The most effective physiological countermeasure for fatigue is sleep. Taking a short, strategic nap has been shown to improve performance. Informing a supervisor is also a critical safety step in a Fatigue Risk Management System (FRMS).

During a shift handover, an AME verbally tells the incoming AME that the torque checks on the main landing gear are 'all done.' However, they fail to mention that one bolt could not be accessed and was not torqued. This omission is a critical failure of which human factor from the 'Dirty Dozen'?

Answer: Lack of Communication

This scenario is a classic example of a 'Lack of Communication.' The outgoing AME failed to convey complete and critical information to the incoming shift, creating a high-risk situation. Effective shift handovers require the clear and thorough exchange of all task-relevant information.