What this profile covers
Operational risk created when water, snow, slush, ice, rubber, or other contamination changes stopping, acceleration, or directional-control performance.
Why it matters
Runway events often combine aircraft energy, surface geometry, weather, traffic, communication, and time-critical decisions. For contaminated runway operations, useful analysis connects the immediate event with exposure, defenses, recurrence, and the wider operating system rather than treating one observation as a final conclusion.
Runway entry, occupancy, condition, identification, directional control, and protected-area risk.
Understand the subject before interpreting a signal.
In plain language, this profile examines operational risk created when water, snow, slush, ice, rubber, or other contamination changes stopping, acceleration, or directional-control performance.
Build a multi-source picture
- Aircraft flight and ground data
- Runway condition and aerodrome information
- ATC, surface-surveillance, and clearance records
- Crew, vehicle, and aerodrome reports
Timing, relationships, and recurrence
Relevant recorded context may include calibrated airspeed, ground spoiler position, thrust reverser status, brake pressure, landing gear status. Use validated mappings and examine signal relationships over the applicable flight phase.
Do not turn an observation into a conclusion
Runway geometry, clearance, surface state, traffic, and aircraft motion must be synchronized; one aircraft signal rarely explains the complete surface event.
Keep controlling material visible
Apply the current approved manuals, procedures, authority requirements, investigation evidence, and validated organizational definitions for any operational decision.
Calibrated airspeed
Indicated airspeed corrected for instrument and position error, as provided by the aircraft data system.
Open parameter guide ↗deg or discreteGround spoiler position
Position or deployment state of panels used to reduce lift and increase wheel loading after touchdown.
Open parameter guide ↗discrete or %Thrust reverser status
Command and/or physical deployment state for reverse thrust, depending on recorded signal availability.
Open parameter guide ↗psi, bar, or %Brake pressure
Hydraulic pressure or command associated with wheel braking; it is not a direct measurement of tyre/runway friction.
Open parameter guide ↗discreteLanding gear status
Command, position, lock, and ground-sensing states associated with the landing gear; these are separate signals with different meanings.
Open parameter guide ↗From a broad topic to a defensible safety review.
Define
State what contaminated runway operations means for the aircraft, operation, authority, and organization in scope.
Verify
Confirm the provenance, quality, timing, units, completeness, and limitations of every data source used.
Describe
Reconstruct what happened and quantify relevant exposure before discussing causes or corrective action.
Corroborate
Compare flight data with reports, operational context, technical evidence, and authoritative source material.
Test barriers
Identify which preventive, recovery, and consequence-mitigation controls should have worked and how their performance can be measured.
Assure
Assign proportionate action and verify whether the control and safety performance improve without harmful unintended effects.
Questions before conclusions
- Q1
How is contaminated runway operations defined for the aircraft, operation, authority, and organization being reviewed?
- Q2
Which precursors, recorded signals, reports, and external data would confirm the event and describe its context?
- Q3
Which preventive, recovery, and consequence-reduction barriers should work, and where could they weaken?
- Q4
What does recurrence, exposure, severity potential, or change over time show before choosing a safety action?
3 connected event profiles
These are terminology and family connections for exploration—not claims that FDM alone can determine the topic.
Heavy braking during taxi
A strong deceleration or brake application occurs during surface movement outside an expected stopping context.
Open FDM profile ↗FDM-084 · Landing rolloutLate braking after touchdown
Brake command or pressure begins later than the validated landing-roll sequence.
Open FDM profile ↗FDM-085 · Landing rolloutLow landing deceleration
Groundspeed reduction is below the validated expectation for the runway, aircraft state, and stopping-system context.
Open FDM profile ↗Go deeper into the closest ASIP research guides.
Runway Excursion
Explore overruns and veer-offs as the combined result of approach energy, runway condition, touchdown, deceleration, and directional control.
Open intelligence brief ↗Flight OperationsRejected Takeoff
Understand the time-critical stop decision through speed, failure recognition, runway remaining, braking, spoilers, and reverse thrust.
Open intelligence brief ↗Flight OperationsLanding Performance
Connect approved landing-distance data with current wind, runway condition, aircraft state, touchdown point, and deceleration technique.
Open intelligence brief ↗12 useful starting points
Original ASIP summaries lead to publisher pages. ASIP does not copy or host the reports.
SAFO 09015 — Training For Maximum Performance Landings on Contaminated Runways
Official U.S. Federal Aviation Administration material indexed for human factors. Open the publisher source for the complete document, scope, and current status.
Open official sourceSAFO 08003 — Guidance Material for Contaminated Runway Landing Operations
Official U.S. Federal Aviation Administration material indexed for approach and landing and runway safety. Open the publisher source for the complete document, scope, and current status.
Open official sourceLanding on contaminated runways
Official Airbus Safety First material indexed for approach and landing. Open the publisher source for the complete document, scope, and current status.
Open official sourceUsing Aircraft as a Sensor on Contaminated Runways
Official Airbus Safety First material indexed for aviation safety. Open the publisher source for the complete document, scope, and current status.
Open official sourceAC 91-79B — Aircraft Landing Performance and Runway Excursion Mitigation
This FAA circular brings together landing-performance planning, time-of-arrival assessment, RCAM information, and operational practices for reducing runway-excursion risk.
Open official sourceBraking system cross connections
Official Airbus Safety First material indexed for runway safety and airworthiness and systems. Open the publisher source for the complete document, scope, and current status.
Open official sourceIs it a Loss of Braking?
Official Airbus Safety First material indexed for runway safety. Open the publisher source for the complete document, scope, and current status.
Open official sourceAnnex 19 — Safety Management, Third Edition
Annex 19 consolidates ICAO safety-management provisions, including State safety responsibilities, SMS, safety-data collection and processing, and the protection and sharing of safety information.
Open official sourceAnnual Safety Review 2025
EASA's review uses occurrence and accident information to describe performance across aviation domains and to support the European safety-risk-management process.
Open official sourceStatistical Summary of Commercial Jet Airplane Accidents, 1959–2024
Boeing's 56th annual statistical summary organizes commercial-jet accident data using stated definitions and the CAST/ICAO occurrence taxonomy.
Open official sourceIATA Annual Safety Report — 2024
IATA's 61st annual report provides an interactive, method-defined view of commercial aviation accident performance and contributing-factor classifications.
Open official sourceAC 120-92D — Safety Management Systems for Aviation Service Providers
FAA guidance explains performance-based, scalable approaches to integrating safety policy, risk management, assurance, and promotion into aviation organizations.
Open official sourceCommon Taxonomy Team
International work on common aviation occurrence categories and definitions for consistent reporting and analysis.
Open referenceSafety Risk Management
European safety-risk process connecting data, safety issues, risk portfolios, priorities, and safety action.
Open referenceAnnual programmes and reports
Annual safety reviews and risk portfolios used to identify key risk areas, safety issues, and emerging issues.
Open referenceEuropean Plan for Aviation Safety 2025
A broad evidence-based portfolio showing the scale and connected nature of current aviation safety issues.
Open referenceOperational issues index
A practical discovery index for operational safety subjects; official authority and manufacturer sources remain controlling where applicable.
Open reference