Site icon Aircraft Engineer

Dirty Dozen in human Factors and it impact on Aircraft maintenance

  1. Lack of knowledge
  2. Lack of assertiveness
  3. Lack of resources
  4. Lack of awareness
  5. Lack of communication
  6. Lack of teamwork
  7. Complacency
  8. Distraction
  9. Stress
  10. Fatigue
  11. Norms
  12. Pressure

The Impact of Lack of Knowledge in Aircraft Maintenance

Lack of knowledge in aircraft maintenance can lead to serious safety risks, operational failures, and even catastrophic accidents. Human factors such as inadequate training, misinterpretation of technical manuals, or failure to follow procedures can result in maintenance errors that compromise flight safety.

Human Factors and Consequences

Real-World Example: British Airways Flight 5390 (1990)

A maintenance engineer mistakenly installed incorrect bolts on the cockpit windshield of a British Airways flight. During flight, the windshield blew out, causing the captain to be partially sucked out of the aircraft. The crew managed to land safely, but the incident highlighted how a lack of proper knowledge and verification in aircraft maintenance can lead to a major crisis.

Proper training, adherence to maintenance protocols, and continuous learning are critical to preventing such incidents in aviation.

The Impact of Lack of Assertiveness in Aircraft Maintenance

Lack of assertiveness in aircraft maintenance can lead to major safety risks when technicians or engineers fail to speak up about concerns, errors, or unsafe practices. Assertiveness is crucial in aviation maintenance, as it ensures that potential issues are addressed before they lead to serious consequences.

Human Factors and Consequences

Real-World Example: Aircraft Mechanic Fall Due to Lack of Assertiveness

An aircraft maintenance team was assigned to replace a light on the aircraft. However, the available access step was too short, requiring the mechanic to stand on his toe tips, which was unsafe. The mechanic wanted to bring a taller step, but the engineer refused, citing lack of time before departure.

Instead of assertively insisting on safety, the mechanic reluctantly proceeded with the task, lost balance, and fell—sustaining injuries. This not only delayed the aircraft further but also led to the engineer’s suspension for prioritizing speed over safety.

Key Lessons from This Incident:

Encouraging a culture where maintenance personnel can speak up about safety concerns without fear is essential in aviation. A small act of assertiveness can prevent major accidents and delays.

The Impact of Lack of Resources in Aircraft Maintenance

A lack of resources—such as proper tools, spare parts, equipment, or trained personnel—can lead to unsafe maintenance practices, delays, and even in-flight emergencies. When maintenance teams do not have what they need, they may resort to improvisation, incomplete repairs, or rushed work, increasing the risk of mechanical failures.

Human Factors and Consequences

Real-World Example: Alaska Airlines Flight 261 (2000)

Due to a lack of proper lubrication tools and maintenance shortcuts, a critical jackscrew in the aircraft’s horizontal stabilizer was not serviced correctly. This led to a catastrophic failure mid-flight, causing the aircraft to crash into the ocean, killing all on board.

Key Lessons:

Aircraft maintenance must never compromise on resources—because safety is non-negotiable

The Impact of Lack of Awareness in Aircraft Maintenance

Lack of awareness in aircraft maintenance can lead to overlooked issues, misjudged risks, and human errors that compromise flight safety. Technicians and engineers must always be aware of their surroundings, potential hazards, and the consequences of their actions. Failing to do so can result in accidents, equipment damage, or flight delays.

Human Factors and Consequences

Real-World Example: Aircraft mechanic installed a fire extinguisher in front of a passenger

An experienced aircraft mechanic installed a fire extinguisher in front of a passenger seat without considering its potential impact during turbulence or hard landings. During a hard landing, a passenger was thrown forward and hit their head on the fire extinguisher, resulting in injuries.

Key Causes of the Incident:

Key Lessons:

Even small oversights in maintenance can lead to injuries or operational issues. Awareness and attention to detail are critical in aviation safety. ✈🔧

Exit mobile version