What the profile screens for
Groundspeed reduction is below the validated expectation for the runway, aircraft state, and stopping-system context.
Why it matters
Low deceleration is a direct runway-overrun precursor and requires runway-condition, wind, braking, reverse, and position data.
Build the event around relationships—not one number.
Define the operating context
Identify the landing state, aircraft configuration, location, and any required external data before applying logic.
Screen the signal relationship
Use validated combinations of groundspeed, longitudinal acceleration, brake pressure; avoid treating one isolated value as the whole event.
Confirm it is a genuine event
Check polarity, units, source, recording rate, dropouts, air/ground logic, persistence, and false-positive mechanisms.
Connect data to the safety question
Review procedures, reports, weather, airport and traffic context, exposure, recurrence, and the strength of the related barriers.
Recorded signals that may help explain the event.
Calibrated airspeed
Indicated airspeed corrected for instrument and position error, as provided by the aircraft data system.
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 ↗Questions before conclusions
- Q1
Are groundspeed, longitudinal acceleration, brake pressure valid, correctly decoded, time-aligned, and sampled well enough for this event?
- Q2
What changed immediately before, during, and after the low landing deceleration indication?
- Q3
How do aircraft configuration, weather, airport geometry, automation state, and crew reports change the interpretation?
- Q4
Which current flight manual, SOP, maintenance, or operator event definition controls the final conclusion?
Safety topics that broaden the event review.
Contaminated runway operations
Operational risk created when water, snow, slush, ice, rubber, or other contamination changes stopping, acceleration, or directional-control performance.
Open topic profile ↗SAT-005 · Runway safetyBraking action reporting
Collection, interpretation, transmission, and operational use of braking observations and runway-surface condition information.
Open topic profile ↗SAT-010 · Runway safetyRunway end safety area
Runway-end design, arresting systems, clear areas, and operational defenses intended to reduce consequences after an overrun or undershoot.
Open topic profile ↗SAT-060 · Powerplant & fuelThrust reverser malfunction
Failure to deploy, stow, remain locked, or respond symmetrically, with consequences for flight, landing deceleration, control, and maintenance.
Open topic profile ↗SAT-066 · Weather & environmentTailwind landing
Landing with a tailwind component and its effects on approach groundspeed, touchdown distance, runway remaining, energy, and stopping margin.
Open topic profile ↗Runway Excursion
Explore overruns and veer-offs as the combined result of approach energy, runway condition, touchdown, deceleration, and directional control.
Open topic brief ↗Flight OperationsRejected Takeoff
Understand the time-critical stop decision through speed, failure recognition, runway remaining, braking, spoilers, and reverse thrust.
Open topic brief ↗Flight OperationsLanding Performance
Connect approved landing-distance data with current wind, runway condition, aircraft state, touchdown point, and deceleration technique.
Open topic brief ↗12 useful starting points
Terminology and topic relationships select these links; the publisher source remains authoritative.
AC 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 sourceSAFO 18009 — SAFO 18009, Risk of Runway Number Transposition Leading to a possible "Runway Overrun" During Takeoff at San Francisco International Airport ( SFO )
Official U.S. Federal Aviation Administration material indexed for approach and landing and takeoff. Open the publisher source for the complete document, scope, and current status.
Open official sourceA320 – Runway overrun
Official Airbus Safety First material indexed for approach and landing and runway safety. Open the publisher source for the complete document, scope, and current status.
Open official sourceFurther Preventing Runway Overrun
Official Airbus Safety First material indexed for approach and landing and runway safety. 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 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 sourceSafety Alert SA-077 — Stabilized Approaches Lead to Safe Landings
The NTSB alert highlights the need to establish and maintain a stabilized approach and to go around when an approach falls outside applicable criteria.
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 sourceSAFO 06010 — Preventing accidents following rejected takeoff ( RTO ): Pilot Guide
Official U.S. Federal Aviation Administration material indexed for takeoff. Open the publisher source for the complete document, scope, and current status.
Open official sourceAirbus Brake Testing
Official Airbus Safety First material indexed for runway safety. Open the publisher source for the complete document, scope, and current status.
Open official source