Etihad A340-600 Preliminary Timeline of Events

The following is the timeline of events from the Etihad A340-600 accident last week:

FROM : AIRBUS FLIGHT SAFETY DEPARTMENT TOULOUSE

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

One Response to Etihad A340-600 Preliminary Timeline of Events

  1. yasobara November 22, 2007 at 3:30 am #

    AIRBUS REMINDS ALL OPERATORS TO STRICTLY ADHERE TO AMM PROCEDURES WHEN PERFORMING ENGINE GROUND RUNS.

    This sounds like “Do as I say, not as I do” , doesn’t it?

    yasobara