AVIATION SAFETY & COMPLIANCE · By ASG
Why Runway Excursions Remain a Top Safety Risk
Runway excursions continue to appear among the most frequent and high-risk accident categories in commercial aviation. The issue is not a lack of awareness or guidance — ICAO, IATA, and EASA have each produced substantial preventive guidance, analytical frameworks, and safety recommendations on runway excursion risk. The issue is the continuing gap between known risk and operational execution: the operational discipline, data integration, and real-time decision-making quality required to prevent runway excursions consistently still falls short in many organisations.
Typical contributing factors include unstable approaches not resulting in go-arounds, wet or contaminated runway conditions not adequately factored into landing decisions, inadequate go-around decision-making under pressure, performance calculation errors or assumptions, and operational pressure and time constraints that bias decisions toward continuation. These are not new problems — they are recurring patterns that organisations with mature safety management systems are expected to actively monitor, trend, and prevent through proactive safety management.
From Data Collection to Operational Decision-Making
Modern aviation organisations are not short on data. Flight Data Monitoring (FDM/FOQA), Safety Management Systems, and occurrence reporting frameworks generate significant safety information. The problem is that this information is not always translated into real-time operational decisions. Safety Performance Indicators are defined but not operationalised. Data is analysed retrospectively rather than proactively. SMS is weakly integrated with flight operations. Risk assessment is not always linked to dispatch decisions. These systemic gaps are precisely what ICAO Annex 19, 3rd Edition — with its emphasis on safety intelligence and predictive safety management — is designed to address.
The latest Annex 19 provisions reinforce a move away from reactive investigation and compliance-only thinking toward predictive risk management, safety intelligence, and integrated Safety Data Collection and Processing Systems (SDCPS). For airlines preparing for or maintaining IOSA certification, the expectation is explicit: SMS must be operationally effective, data-driven, and demonstrably influencing operational decisions — not simply documented in a manual.
Operational Gaps and Regulatory Perspectives
Operational Gaps Behind Runway Excursions:
Runway excursions are often the result of systemic gaps rather than isolated pilot or system errors. Many events reflect recurring weaknesses in decision-making, monitoring, and organisational discipline — including ineffective enforcement of stabilised approach criteria, tolerance of operational deviations under pressure, weak integration of weather and runway data into live risk models, insufficient use of FDM/FOQA for predictive analysis, and safety culture weaknesses under operational constraints. Addressing these systemic gaps requires organisational commitment at management level, not just procedural updates.
Regulatory Perspective — IOSA, EASA TCO, and UK CAA TCO:
Regulatory frameworks already address many of the known runway excursion contributing factors. IOSA emphasises operational discipline, standardised procedures, and effective SMS implementation as the baseline for registered airlines. EASA TCO focuses on operational control, oversight quality, and actual implementation evidence during the continuous monitoring process. UK CAA TCO increasingly requires mature compliance strategies and stronger evidence of SMS effectiveness. These frameworks are progressively aligned with performance-based oversight — where effectiveness matters more than documentation alone.
Moving from Compliance to Safety Intelligence:
The aviation industry is entering a new phase. Having an SMS is no longer sufficient — organisations must ensure their safety systems are data-driven, operationally integrated, and predictive rather than reactive. This evolution marks the transition from compliance-based safety to true safety intelligence. Organisations that make this transition will not only perform better in regulatory audits — they will demonstrably reduce the risk of runway excursion events through stronger hazard identification, trend monitoring, and management action before events escalate.
How to Prevent Runway Excursions: Practical Actions
The Challenge Is Known — The Response Must Evolve
The challenge is no longer identifying runway excursion risk. The challenge is ensuring that your safety system is capable of preventing it in real time — through stronger data integration, operational discipline, and predictive safety management. Runway excursion continues to be a high-risk accident category not because the risk is unknown, but because the operational systems and safety cultures required to prevent it consistently are still maturing across much of the industry. Aero Support Group supports operators, MROs, and aviation stakeholders in transforming safety and compliance systems into operationally effective frameworks aligned with ICAO Annex 19, IOSA, EASA TCO, UK CAA TCO, and Part-145 requirements.
Runway excursion persists as a leading accident category because it is fundamentally a system-level risk requiring integrated operational discipline, data-driven decision support, and management commitment — not just procedural compliance. Contributing factors like unstable approach continuation, performance calculation errors, and operational pressure are deeply embedded in operational culture and decision-making patterns. Addressing them requires sustained organisational effort, not one-time procedural updates.
An effective SMS helps prevent runway excursions by identifying the operational hazards that contribute to excursion risk (unstabilised approaches, contaminated runways, FDM exceedances), monitoring Safety Performance Indicators for early warning trends, bringing hazard data to management review for timely action, and fostering a safety culture that encourages reporting and supports go-around decisions without operational pressure to continue. ICAO Annex 19 (3rd Edition) reinforces that SMS effectiveness — not just existence — is the standard against which organisations are assessed.
IOSA standards require airlines to implement effective SMS processes covering hazard identification and risk management for flight operations, including runway safety risks. This includes demonstrable use of FDM/FOQA data for safety trend analysis, enforceable stabilised approach policies, and evidence that safety data influences operational decisions. IOSA auditors assess not just whether policies exist but whether they are implemented, monitored, and enforced in real operations.
Both EASA TCO and UK CAA TCO assess whether non-EU/non-UK airlines demonstrate effective SMS implementation and operational safety oversight as a condition of authorization. The continuous monitoring component of both regimes — including SAFA ramp inspections for EASA — evaluates operational discipline and the quality of safety management processes. Airlines with runway safety gaps identified during monitoring face additional scrutiny and potential authorization review.
ICAO Annex 19, 3rd Edition introduces formal requirements for safety intelligence development — the structured analysis of safety data to support proactive decision-making. For runway excursion prevention, this means organisations must not just collect FDM exceedances and occurrence reports, but analyse them for system-level patterns, identify precursor trends before accidents occur, and demonstrate that safety intelligence outputs are informing operational decisions at management level.
- Enforce strict stabilised approach policies with zero tolerance for continuation below gate
- Link SPIs directly to go/no-go operational decisions and dispatch risk assessments
- Integrate weather and runway condition data into real-time risk models and crew briefings
- Use FDM/FOQA data for predictive trend identification — not just retrospective investigation
- Strengthen communication between dispatch, crew, and safety departments on live risk data
- Embed safety intelligence into real operational decision-making at management and crew level
Need Support with Runway Safety, SMS, or Regulatory Compliance?
Aero Support Group supports operators, MROs, and aviation stakeholders in transforming safety and compliance systems into operationally effective frameworks aligned with ICAO Annex 19, IOSA, ISAGO, EASA TCO, UK CAA TCO, Part-145, and CAMO requirements.
References
- ICAO — Runway Safety Resources and Prevention Guidance
- IATA — Runway Excursion Risk Reduction Toolkit (RERR)
- EASA — Safety Risk Portfolio: Runway Excursion Category
- ICAO Annex 19, 3rd Edition — Safety Intelligence and SMS effectiveness
- SKYbrary — Runway Excursion: Causes, Consequences, and Prevention
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