Incident Overview

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 LACCIDENT: “Laccident est d la ralisation sans cales et sur les quatre moteurs la fois dun essai au cours duquel la pousse tait voisine de la capacit du frein de parc de lavion. Labsence de systme de dtection et de correction des drives dans la ralisation des essais au sol, dans un contexte de pression industrielle et commerciale permanente, a favoris la ralisation dun essai en dehors des procdures tablies. La surprise a amen le technicien dessais sol se focaliser sur le systme de freinage ; de ce fait, il na pas pens rduire la pousse 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.Share on: