FAA Aviation Mechanic General (AMG)Regulations, Records and Human FactorsHard
A technician completes an avionics upgrade without realizing that a previous modification rerouted a bundle of wires directly behind the panel he is about to drill into, because he did not check for recent wiring changes before starting work. Which Dirty Dozen factor is illustrated?
- ALack of Knowledge
- BDistraction
- CComplacency
- DLack of Awareness
Show answer & explanationAnswer & explanation
Correct answer: D. Lack of Awareness
Lack of Awareness is a failure to recognize a hazardous situation because a technician does not have full situational understanding of changes or conditions around the task, such as unmapped modifications to the aircraft.
Why the other options are wrong
- A. Lack of Knowledge is a general skills/training gap, not a failure to check the current condition of a specific aircraft.
- B. Distraction requires an active interruption during the task, which is not described.
- C. Complacency stems from routine overconfidence on a familiar task, not from unknown recent changes.
Lack of Awareness (Dirty Dozen)
A human factor describing failure to recognize a hazard or situational change, such as an unexpected modification, before or during a task.
- Different from Lack of Knowledge, which is a general skills gap
- Mitigated by reviewing current maintenance records and recent alteration history
- Common in shared or previously modified aircraft
Memory trick: 'Awareness blind spot' — didn't check what changed before drilling in.