+ Responder Tema
Resultados 31 al 40 de 46
- 21/11/2007, 13:14 #31
- 16/03/2009, 22:32 #32
- 30 dic, 07
- Eterno desubicado
Hola. Aunque la noticia es vieja refloto el post porque me llama la atención el último párrafo del informe ¿Cómo es que no se les ocurrió quitar gases? O es que mi limitado inglés, lo avanzado de la hora y el vino de la tierra que acompañó mi cena me impiden comprender que pasó...
Violation of test procedures led to Toulouse A340-600 crash
By David Kaminski-Morrow
Investigators have determined that an Airbus A340-600 collided with a test-pen wall in Toulouse after it was powered up while unchocked, and an attempt to steer the aircraft out of danger reduced the effect of the brakes.
The test crew failed to reduce the engine thrust as the jet surged forward, attempting instead to stop the aircraft by pressing the brake pedals and turning the nose-wheel sharply to the right. It smashed into the pen wall, seriously injuring four of the nine people on board.
A division of the French Bureau d'Enquetes et d'Analyses, which conducted the inquiry, has released its final report into the accident, stating that "lack of detection and correction" of test-procedure violations helped lead to the accident.
It points out that procedures for the test, aimed at checking for oil leaks, were not correctly followed, noting that the engines were all operating at high power and the aircraft was left unchocked.
Detailing the events leading to the collision, it says the aircraft arrived in the test-pen at 14:19 on 15 November last year and underwent routine engine tests for about 1hr 40min.
Just before 16:00 the power of the Rolls-Royce Trent 500 engines was increased to an engine pressure ratio of 1.25 - with the thrust levers corresponding to a position between maximum continuous thrust and maximum take-off thrust.
All four engines were operating. While the parking brake was on, registering 2,600psi, the inquiry says the applied thrust was around the limit of the parking-brake capacity.
At the time of the accident an Airbus employee was occupying the right-hand seat of the jet while an Abu Dhabi Aircraft Technologies technician was in the left-hand seat.
Flight-recorder data shows that, shortly after 16:02, the person in the left-hand seat warned that the aircraft was moving. The ground speed began gradually increasing to 4kt over the next few seconds and, after a second call that the aircraft was moving, the recorder registered pedal-braking and the deactivation of the parking brake.
Brakes on the A340-600 are linked to two hydraulic circuits: the 'green' normal circuit and the 'blue' alternate. The parking brake is on the blue circuit and only applies to the left- and right-hand main undercarriage bogies, not the centre bogie.
If the parking brake is released and the brake pedals applied, the 'green' circuit comes into play. The pedals act on all three main bogies.
Recorder data shows that 'green' circuit brake pressure on the A340 rapidly rose to 2,500psi while the 'blue' circuit pressure dropped.
About seven seconds after the first movement warning the nose-wheel was turned sharply right. Activating the nose-wheel steering inhibits braking on the central bogie, becoming completely ineffective past 20° of steering.
The aircraft swung 37° to the right but continued to accelerate, its speed increasing from 4kt to 31kt in seven seconds, before the aircraft struck the test-pen wall, demolishing its forward fuselage. The jet was written off.
In its report into the accident, the BEA says the aircraft and its braking system functioned correctly, but states that the nose-wheel steering "limited the effectiveness" of the brakes.
"Surprise led the ground-test technician to focus on the braking system, so he did not think about reducing the engines' thrust," it adds. Only after the collision with the wall were the throttle levers retarded to the idle positionSoy incapaz de una traición, incapaz de una falsa promesa... soy básicamente incapaz
- 16/03/2009, 23:26 #33
SUBJECT: A340-600 - MSN 856 - ACCIDENT IN PRODUCTION OUR REF.: F-WWCJ AIT 2 DATED 20th OF NOVEMBER 2007 PREVIOUS REF: F-WWCJ AIT 1 DATED 16th OF NOVEMBER 2007
THIS AIT IS AN UPDATE OF PREVIOUS AIT N?1 CONCERNING THE A340-600 PRODUCTION AIRCRAFT MSN 856 INVOLVED IN AN ACCIDENT IN AIRBUS PRODUCTION FACILITIES IN TOULOUSE ON THE 15TH NOVEMBER 2007 AT 17:00 LOCAL TIME.
THE FOLLOWING IS THE SEQUENCE OF EVENTS ACCORDING TO THE RECORDERS, WHICH HAS BEEN APPROVED FOR RELEASE BY THE FRENCH INVESTIGATION AUTHORITIES (BEA).
FOR ABOUT 3 MINUTES BEFORE THE END OF THE EVENT, ALL FOUR ENGINES EPR WAS BETWEEN 1.24 AND 1.26 WITH PARKING BRAKE ON AND WITHOUT GROUND CHOCKS. THE ALTERNATE BRAKE PRESSURE WAS NORMAL. (WITH PARKING BRAKE ON, BRAKE PRESSURE IS SUPPLIED BY ALTERNATE).
13 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.
2 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.
THERE IS NO EVIDENCE OF ANY AIRCRAFT SYSTEM OR ENGINE MALFUNCTION.
AIRBUS REMINDS ALL OPERATORS TO STRICTLY ADHERE TO AMM PROCEDURES WHEN PERFORMING ENGINE GROUND RUNS
ENGINE GROUND RUNS AT HIGH POWER ARE NORMALLY CONDUCTED ON A SINGLE ENGINE WITH THE ENGINE IN THE SAME POSITION ON THE OPPOSITE WING OPERATED AT A LIMITED THRUST SETTING TO AVOID DAMAGE TO THE AIFRAME
WHEEL CHOCKS ARE TO BE INSTALLED THROUGHOUT THE TEST.
YANNICK MALINGE VICE PRESIDENT FLIGHT SAFETY AIRBUS
Última edición por TonyMontana; 16/03/2009 a las 23:29
- 17/03/2009, 10:42 #34
- 17/03/2009, 10:46 #35
- 13 may, 08
- SI ALGUIEN ME HA VISTO QUE ME DIGA DONDE ESTOY...
Hombre por la ultima foto no lo veo yo volando.... asi que imagino que se habra declarado "siniestro total"....INSTITUTO, GLORIA A TI,
POR TU HONOR QUIERO VIVIR.
VIVA ESPAÑA, VIVA EL REY,
VIVA EL ORDEN Y LA LEY,
VIVA HONRADA LA GUARDIA CIVIL.
GUARDA FIEL DE ESPAÑA ENTERA,
QUE LLEVAS EN TU BANDERA
EL LEMA DE PAZ Y HONOR.
- 17/03/2009, 11:03 #36
- 17/03/2009, 11:25 #37
Pepe Has puesto el freno mano ?? XDXD
- 17/03/2009, 15:21 #38
[Modo "me van a apedrear"] ON
Ryanair compra un 340-600 de 2º mano para iniciar sus vuelos transoceanicos
[Modo "me van a apedrear"] OFF
- 17/03/2009, 17:21 #39
- 17/03/2009, 22:45 #40
¿Y quien carga con las pérdidas que ha generado tirar ese avión a la basura?