Incident Overview

Date: Friday 23 August 1991
Aircraft Type: Boeing 767-2J6ER
Owner/operator: Air China
Registration Number: B-2556
Location: Stockholm-Arlanda Airport (ARN) – ÿ Sweden
Phase of Flight: Landing
Status: Substantial, repaired
Casualties: Fatalities: 0 / Occupants: 180
Component Affected: Autobrakes, Reverse Mechanism, Landing GearAutobrakes, Reverse Mechanism, Landing Gear
Investigating Agency: SHKSHK
Category: Accident
A Boeing 767 experienced a near-miss landing due to a combination of factors during a manual visual approach. The aircraft initiated a high-speed landing, but the autobrakes failed to engage, leading to a swerving maneuver and a left turn towards a taxiway. Subsequent ground contact resulted in a dig-in, stopping the aircraft within 80 meters. The deactivated reverse mechanism and erratic directional control contributed to the incident.A Boeing 767 experienced a near-miss landing due to a combination of factors during a manual visual approach. The aircraft initiated a high-speed landing, but the autobrakes failed to engage, leading to a swerving maneuver and a left turn towards a taxiway. Subsequent ground contact resulted in a dig-in, stopping the aircraft within 80 meters. The deactivated reverse mechanism and erratic directional control contributed to the incident.

Description

The pilot made a manual visual approach, activated the autobrake system and disconnected the auto throttle, passing the threshold with 19 kt excess speed. When the main wheels touched down 800 m into the runway, the autobrakes disengaged without the brake pedals/spoiler handle having been touched. During roll-out the aircraft was swerving with little retardation and, with 600 m runway remaining, a left turn towards the high speed turn-off taxiway was initiated. When abreast of the far end of the runway the nose-wheel left the concrete taxiway and dug into the ground. The aircraft stopped within 80 m with the left main gear still on the taxiway. The reverse mechanism on both engines had been deactivated four days earlier due to a requirement stemming from an emergency Airworthiness Directive. This AD was issued following the fatal accident of a Lauda Air Boeing 767 in May 1991 that occurred following the in-flight deployment of a thrust reverser. Causes of the accident: – The landing took place at too high a speed and far into the runway. – The reversers were off. – Auto braking disengaged during the setting. – Erratic directional control after touchdown. – The captain couldn’t stop the aircraft on the runway. – The nose wheels buried themselves in the ground beside the track.

Primary Cause

Inadequate braking system control and a failure to properly engage the autobrakes during a critical landing phase.Inadequate braking system control and a failure to properly engage the autobrakes during a critical landing phase.

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