Incident Overview

Date: Thursday 15 November 2007
Aircraft Type: Airbus A340-642X
Owner/operator: Airbus Industrie
Registration Number: F-WWCJ
Location: Toulouse-Blagnac Airport (TLS) – ÿ France
Phase of Flight: Standing
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 9
Component Affected: A340-600 aircraft’s engines.A340-600 aircraft’s engines.
Investigating Agency: BEABEA
Category: Other
An Airbus A340-600 was undergoing ground testing at the Airbus plant in Toulouse when it experienced a sudden loss of control and impact with a containment wall. The wheels were not chocking, and the engine power exceeded the maximum allowed level shortly after engine and brake tests began. The aircraft then accelerated rapidly, applying brakes and releasing the parking brake, leading to a sudden impact. Three persons were injured.An Airbus A340-600 was undergoing ground testing at the Airbus plant in Toulouse when it experienced a sudden loss of control and impact with a containment wall. The wheels were not chocking, and the engine power exceeded the maximum allowed level shortly after engine and brake tests began. The aircraft then accelerated rapidly, applying brakes and releasing the parking brake, leading to a sudden impact. Three persons were injured.

Description

An Airbus A340-600 due to be delivered to Etihad Airways as A6-EHG was performing ground tests at the Airbus plant, Toulouse Airport. The wheels were not chocked when the crew started engine and brake tests at 15:19. Until 15:58 the maximum epr on the engine was between 1.04 and 1.22. One hour later tests were recommenced. All four engines were on 1.24 and 1.26 epr power for about three minutes. Thirteen seconds before the impact the aircraft started to move. Within 1 or 2 seconds the crew applied brake pedal inputs and selected parking brake off. These actions led the normal brake pressure to increase to its normal value. Two seconds prior before the impact, all 4 engine thrust levers were selected to idle. The aircraft impacted the containment wall at a ground speed of 30 kts. The nose went up and through the concrete wall. Five persons were injured. CAUSES DE L’ACCIDENT: “L’accident est d– … la r‚alisation sans cales et sur les quatre moteurs … la fois d’un essai au cours duquel la pouss‚e ‚tait voisine de la capacit‚ du frein de parc de l’avion. L’absence de systŠme de d‚tection et de correction des d‚rives dans la r‚alisation des essais au sol, dans un contexte de pression industrielle et commerciale permanente, a favoris‚ la r‚alisation d’un essai en dehors des proc‚dures ‚tablies. La surprise a amen‚ le technicien d’essais sol … se focaliser sur le systŠme de freinage ; de ce fait, il n’a pas pens‚ … r‚duire la pouss‚e des moteurs.”

Source of Information

http://www.skybrary.aero/index.php/A346,_Toulouse_France,_2007_(GND_HF)http://www.skybrary.aero/index.php/A346,_Toulouse_France,_2007_(GND_HF)

Primary Cause

Lack of braking system checks during ground testing.Lack of braking system checks during ground testing.

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