Two separate easyJet Airbus A320 departures in the summer of 2025 have attracted significant attention within the aviation industry after both aircraft commenced takeoff from runway positions that did not match the performance calculations prepared by their flight crews. Although neither flight resulted in injuries or damage, investigators determined that both departures involved a reduction in the runway distance available for takeoff, creating a potentially serious safety risk.
The incidents occurred just weeks apart at London Luton Airport (LTN) and Manchester Airport (MAN), prompting renewed discussion about human factors, cockpit procedures, and the importance of verifying runway entry points before takeoff. Findings released by the UK’s Air Accidents Investigation Branch (AAIB) indicate that a combination of expectation bias, routine operational habits, and procedural weaknesses contributed to the events.
The London Luton EasyJet A320 Incident
The first occurrence took place on June 13, 2025, involving easyJet flight EZY2335 from London Luton Airport to Málaga Airport (AGP) in Spain. The aircraft involved was an Airbus A320-214, registered G-EZUK, carrying 180 passengers and six crew members.
During pre-flight planning, the flight crew initially intended to depart from Intersection Alpha on Runway 25, a commonly used departure point that allows aircraft to enter the runway without taxiing to the threshold. Performance calculations were completed using the airline’s electronic flight bag system based on this departure plan.
As preparations continued, however, the crew recognized that the aircraft’s operating weight and prevailing conditions required a full-length runway departure rather than an intersection departure. The aircraft weighed approximately 68,887 kilograms (151,870 pounds), and available performance margins from the intersection were determined to be insufficient.
The pilots subsequently recalculated takeoff performance using the full runway length, ensuring compliance with required safety margins.
Despite making the correct calculations, a critical breakdown occurred later in the departure sequence.
The aircraft eventually lined up at the runway intersection instead of the runway threshold and began its takeoff roll using a shorter runway distance than assumed in the calculations.
According to the AAIB investigation, the crew did not recognize the discrepancy during the takeoff roll. The aircraft continued accelerating and successfully became airborne, crossing the end of the runway at approximately 65 feet (19 meters) above ground level before climbing away normally toward Spain.
The issue remained unnoticed until later that day when easyJet’s Flight Data Monitoring (FDM) system detected anomalies within the recorded flight data.
Investigators emphasized that the aircraft was able to depart safely, but the margin between the actual departure conditions and the calculated performance assumptions had been significantly reduced.
Flight Data Monitoring Revealed The Error
One of the most important aspects of the investigation was the role played by modern flight monitoring technology.
Airlines routinely collect operational data from flights and analyze thousands of parameters to identify trends, risks, and procedural deviations. In this case, easyJet’s Flight Data Monitoring system automatically detected that the aircraft had begun its takeoff from a different position than the one used in the crew’s calculations.
Without this monitoring capability, the discrepancy might never have been identified.
The AAIB noted that the crew completed performance calculations for a full-length departure but physically conducted the takeoff from an intersection position. Because the aircraft still achieved flight safely, no immediate operational indication alerted the pilots that a mismatch existed.
The discovery highlighted how data-driven safety programs increasingly serve as a critical final layer of defense within modern airline operations.
A Similar EasyJet Event Occurred At Manchester
Only weeks after the Luton incident, a remarkably similar event occurred at Manchester Airport.
On July 6, 2025, another easyJet Airbus A320 operating a flight from Manchester to Kos International Airport (KGS) in Greece departed from a runway position that differed from the assumptions used during takeoff performance calculations.
Although details of the Manchester occurrence varied, investigators noted that the fundamental issue closely resembled the earlier Luton event.
Rather than using an entirely incorrect runway, the aircraft departed from a different point along the same runway than the one assumed during planning. As a result, the available takeoff distance was shorter than the distance incorporated into the aircraft’s performance data.
The similarity between the two events drew attention because both involved the same airline, the same aircraft family, and nearly identical procedural vulnerabilities. Together, the incidents illustrated how seemingly minor deviations during taxi and runway entry can create significant operational consequences.
Human Factors Played A Central Role
The AAIB’s findings focused heavily on human factors, which are frequently identified as contributing elements in aviation safety investigations.
Investigators found no evidence that the Luton crew was under unusual pressure or intentionally bypassed required procedures. In fact, the aircraft was reportedly ready slightly ahead of schedule, eliminating concerns about time pressure influencing decision-making.
Instead, the report pointed toward a phenomenon known as confirmation bias.
The crew had extensive experience departing from the runway intersection and had recently observed numerous aircraft using the same entry point. This repeated exposure created a strong expectation that the intersection departure would be used again.
When air traffic control asked whether the aircraft could depart from the intersection, the crew responded affirmatively. Investigators concluded that this exchange likely reflected habitual behavior rather than a deliberate reassessment of the flight’s performance requirements.
Additional cues that might have triggered a review of the departure plan were also missed. Shortly before the departure, another aircraft informed controllers that it required the full runway length. Despite hearing this transmission, the easyJet crew did not reconsider their own departure assumptions.
Workload during taxi operations and preparation for departure likely reduced the crew’s ability to detect the inconsistency.
Procedural Weaknesses Exposed
The investigation also identified shortcomings in the airline’s procedural safeguards.
A critical verification step relied heavily on crew memory instead of requiring a direct comparison between the calculated performance data and the aircraft’s actual runway entry position. Because the procedure depended on recollection rather than systematic validation, the mismatch remained undetected.
Aviation safety systems are typically designed around multiple layers of protection. When one layer fails, another should ideally catch the error before it develops into a serious event. In these cases, several layers aligned in a way that allowed the departures to proceed despite the discrepancy.
The AAIB concluded that stronger cross-check procedures could have interrupted the error chain before the aircraft entered the runway.
EasyJet Strengthens Takeoff Verification Procedures
Following the incident, easyJet implemented procedural changes aimed at preventing similar occurrences in the future.
The airline revised its takeoff performance verification process to reduce dependence on memory-based checks and introduce more robust confirmation methods. These updates are intended to ensure that the runway position entered into performance calculations matches the runway position actually used during departure.
The two Airbus A320 incidents demonstrate how aviation safety often depends on managing small details with exceptional precision. A difference of only a few thousand feet of runway can dramatically affect aircraft performance calculations, particularly when operating near weight limits or under challenging environmental conditions.
While both flights concluded safely, the events serve as important reminders that modern aviation’s strong safety record is built on constant vigilance, procedural discipline, and the willingness to learn from even the smallest operational deviations.
