What the profile screens for
Brake command or pressure begins later than the validated landing-roll sequence.
Why it matters
Delayed braking can reduce stopping margin, especially after long touchdown, on contaminated runways, or with limited deceleration.
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 brake pressure, autobrake state, groundspeed; 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 ↗deg or discreteGround spoiler position
Position or deployment state of panels used to reduce lift and increase wheel loading after touchdown.
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 ↗Questions before conclusions
- Q1
Are brake pressure, autobrake state, groundspeed valid, correctly decoded, time-aligned, and sampled well enough for this event?
- Q2
What changed immediately before, during, and after the late braking after touchdown 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-017 · Approach & landingLanding flare
Transition from approach descent to touchdown, including pitch, thrust, sink, visual cues, wind, aircraft response, and runway remaining.
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 sourceAirbus New Operational Landing Distances
Official Airbus Safety First material indexed for approach and landing. Open the publisher source for the complete document, scope, and current status.
Open official sourceOperational Landing Distances
Official Airbus Safety First material indexed for approach and landing. 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 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 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 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 source