Strengthening Safety: A Look at Human Factors in Business Aviation

Updated April 27, 2026

The Deep Dive: Uncovering Critical Human Factors

To move beyond generalized evidence and address the most critical human factors challenges, the Human Factors Working Group conducted a comprehensive, data-driven review of accident and incident events within the business aviation sector. The team examined 15 final investigation reports from the past decade, focusing exclusively on events with a final NTSB report.

The objective was to identify and categorize the three most influential human factors contributing to each event. This systematic approach quickly revealed recurring patterns that transcended surface-level causes, pointing instead to deeper, systemic issues affecting human performance. Drawing on established frameworks like the FAA’s Dirty Dozen, the review highlighted some areas where performance often degraded under operational stress. The analysis showed that a lack of awareness was a contributing factor in approximately 40% of the analyzed events. Complacency was noted in roughly 25% of cases, while a lack of knowledge appeared in about 15%.

These findings establish a clear mandate for the industry: a focused effort on these three human factors is essential to meaningfully enhance overall safety performance.

1. Lack of Awareness – The Foundation of Decision-Making Process
2. Complacency – Erosion of Standards and Normalization of Deviance
3. Lack of Knowledge – Systemic Training Shortfalls

Top Three Human Factors and Mitigation Strategies

1. Lack of Awareness – The Foundation of Decision-Making Process

Failures in risk assessment, poor go/no-go decisions and continuation bias are often rooted in a loss or lack of situational awareness (SA). SA is the backbone of effective decision-making, and its degradation due to factors like fatigue, distraction or high workload, is the primary causal factor in numerous NTSB-investigated accidents attributed to human error. (See Mica Endsley’s, Toward a theory of situation awareness in dynamic systems. Human Factors, 1995.)

The most significant loss of SA occurs when operators activate inappropriate mental models despite clear real-world evidence, a phenomenon that can lead to confirmation bias and an unwavering commitment to an incorrect course of action.

If a person is said to have good situational awareness, it generally means an individual is fully cognizant of their environment, its components, their relative position, and can accurately predict their near-term status in space and time. (See A Review of Situational Awareness Literature Relevant to Pilot Surveillance Functions, FAA, March 22, 2002, by John Uhlarik and Doreen Comerford.)

In the cockpit, SA can be compromised by a host of issues, including stress, poorly presented information or simply forgetting important details. The link between lost SA and non-procedural compliance is undeniable. For instance, a pilot distracted while being vectored for an approach might lose awareness and command configuration changes outside the aircraft’s operational envelope.

To maintain procedural adherence, flight crews must prioritize a full understanding of their operating environment and anticipate actions accordingly. The key takeaways for aviators and maintenance personnel are clear:

• Know Your Environment
  Be fully aware of the airport, airspace, hangar conditions and weather conditions.
• Know Your Position
  Understand your speed, altitude, phase of flight, the next phase, next step of the procedure.
• Know Your Aircraft
  Be fluent in limitations, performance factors, systems and procedures.
• Know the Flight and Ground Modes
  Be certain of the automation status (for example, autopilot, autothrottles, descent mode and ground configurations).

For more information, review the Skybrary, Situational Awareness Quick Reference and Reminder.

Crew resource management (CRM) is vital for maintaining shared situational awareness in the flight deck, especially during high-workload phases of flight.

2. Complacency – Erosion of Standards and Normalization of Deviance

The second major factor, complacency, often manifests through ambiguities in Crew Resource Management (CRM), ineffective handoffs, and a lack of assertiveness. This issue is frequently compounded by the Normalization of Deviance. The Human Factors Working Group study observed that over-reliance on sophisticated automation and the routine nature of low-threat operations can lead to a dangerous reduction in vigilance, causing crews to overlook subtle cues and adopt workarounds that systematically undermine procedural standards.

Complacency is a persistent challenge. While crews are highly proficient with flight deck automation, training often fails to sufficiently emphasize the necessity of continuous monitoring and manual reversion skills. In the absence of high-threat scenarios, the quiet segments of routine flights can breed reduced vigilance.

Normalization of Deviance

Equally concerning is the normalization of deviance, where minor deviations from standard operating procedures (SOPs) and aircraft maintenance manuals (AMMs) are gradually accepted until they become the established norm. Small workarounds, such as skipping checklist items, abbreviating briefings, skipping procedure steps or marginally stretching weather minimums, may go unchallenged.

Training programs must address this subtle cultural drift by focusing not just on technical proficiency but on behavioral discipline. A robust safety culture must actively challenge the rationalization of unsafe practices as normal or acceptable. Historical case studies serve as a powerful reminder of how the gradual erosion of standards can lead to catastrophic outcomes, and these lessons must be fully integrated into recurrent training.

Pre-flight briefings are a critical defense against complacency and the normalization of deviance, ensuring all crew members are aligned with SOPs.

3. Lack of Knowledge – Systemic Training Shortfalls

Non-compliance with SOPs, AMMs or checklists, often driven by perceived time pressure or underlying complacency, is frequently linked to system-specific knowledge deficiencies, limited knowledge of maintenance procedures and pilot preparation gaps. The analysis indicated that inadequate preparation for demanding operations, reliance on outdated practices, and insufficient training for support staff (including technicians and line services personnel) contribute to a pattern of repeat errors, signaling systemic training shortfalls rather than isolated mistakes.

Shortcomings in Training and Knowledge

Industry safety audits have underscored significant knowledge gaps across both maintenance and flight operations. (See EASA’s Safety Issue Report, Skills and Knowledge Degradation due to Lack of Recent Practice.)

• Insufficient Training for Support Staff
  Technicians often receive generalized training rather than instruction tailored to specific aircraft systems. This gap can lead to improper tool use, incomplete troubleshooting and recurring maintenance issues. The complexity of modern integrated aircraft systems demands substantial technical training and current relevant experience.
• Pilot Preparation Gaps
  Incidents have revealed that pilots may be inadequately prepared for complex or unusual operations, lacking the necessary qualification or experience. Furthermore, reliance on outdated practices instead of current guidance suggests a shortfall in recurrent training effectiveness.
• System-Specific Deficiencies
  Both pilots and maintainers frequently demonstrate a limited understanding of aircraft limitations, performance factors, or automation features. System knowledge is a crucial problem-solving tool, enabling crews to understand and address malfunctions effectively.

The repetition of errors highlights a critical need for effective feedback loops. Lessons learned from incidents must be actively integrated into training programs to break the cycle of repeat mistakes. Organizations must enforce comprehensive training and qualification requirements to ensure safe decision-making across all operational roles.

Specialized training for maintenance personnel is essential to prevent errors and ensure the airworthiness of complex business aircraft systems.

Practical Recommendations for Enhanced Human Performance

The Human Factors Working Group analysis, informed by internal studies on situational awareness and external line operations safety audit (LOSA) data, provides a clear set of forward-looking recommendations for the business aviation community:

The Ongoing Commitment to Excellence

There are encouraging signs of progress in business aviation training. NBAA recently published the Airplane Standard Operating Procedures (SOP) Manual, which is expected to serve as a foundational reference for best practices across the industry. Major training providers such as CAE and FlightSafety are adopting and integrating these SOPs into their programs, helping to standardize operational expectations and reinforce procedural discipline.

In parallel, training methodologies are evolving to better reflect the realities of modern operations. The shift toward competency-based training and assessment (CBTA), rooted in ICAO guidance, offers a globally recognized framework for enhancing pilot performance. CBTA moves beyond legacy, time-based instruction by focusing on the development of operational competencies, observable behaviors that are directly linked to safe and effective performance. This approach enables training programs to address specific human factors categorized into pilot competencies and observable behaviors. By incorporating lessons learned from operational data as well as observable behavior data from pilots in training, CBTA ensures that recurrent programs remain relevant, adaptive and performance-driven. Ultimately, CBTA supports a safety culture built on continuous improvement and accountability.

• IATA White Paper: Competency-Based Training and Assessment (CBTA) Expansion within the Aviation System.
• CAE Blog Post: Competency Based Training and Assessment, CBTA, in aviation training

Conclusion

By focusing on these top three human factors: Lack of Awareness, Complacency, and Lack of Knowledge, the business aviation community can move beyond reactive measures and implement proactive strategies that build a more resilient and robust safety culture. The goal is to position knowledge as a shared responsibility and build stronger feedback loops, so errors trigger necessary training updates rather than being repeated. Through this ongoing commitment to understanding human performance, business aviation can solidify its reputation as a safe form of transportation and ensure a future of sustained operational excellence.