AF A340 in YYZ: TSB-Report ist veröffentlicht

[Peter Guth]

hallo,

 

heute wurde der Untersuchungsbericht veröffentlicht. Lest bitte selbst mal.

 

http://bst-tsb.gc.ca/en/reports/air/2005/a05h0002/a05h0002_index.asp

 

 

Fazit:

 

Findings as to Causes and Contributing Factors

 

1. The crew conducted an approach and landing in the midst of a severe and rapidly changing thunderstorm. There were no procedures within Air France related to distance required from thunderstorms during approaches and landing, nor were these required by regulations.

 

2. After the autopilot and autothrust systems were disengaged, the pilot flying (PF) increased the thrust in reaction to a decrease in the airspeed and a perception that the aircraft was sinking. The power increase contributed to an increase in aircraft energy and the aircraft deviated above the glide path.

 

3. At about 300 feet above ground level (agl), the surface wind began to shift from a headwind component to a 10-knot tailwind component, increasing the aircraft's groundspeed and effectively changing the flight path. The aircraft crossed the runway threshold about 40 feet above the normal threshold crossing height.

 

4. Approaching the threshold, the aircraft entered an intense downpour, and the forward visibility became severely reduced.

 

5. When the aircraft was near the threshold, the crew members became committed to the landing and believed their go-around option no longer existed.

 

6. The touchdown was long because the aircraft floated due to its excess speed over the threshold and because the intense rain and lightning made visual contact with the runway very difficult.

 

7. The aircraft touched down about 3800 feet from the threshold of Runway 24L, which left about 5100 feet of runway available to stop. The aircraft overran the end of Runway 24L at about 80 knots and was destroyed by fire when it entered the ravine.

 

8. Selection of the thrust reversers was delayed as was the subsequent application of full reverse thrust.

 

9. The pilot not flying (PNF) did not make the standard callouts concerning the spoilers and thrust reversers during the landing roll. This further contributed to the delay in the PF selecting the thrust reversers.

 

10. Because the runway was contaminated by water, the strength of the crosswind at touchdown exceeded the landing limits of the aircraft.

 

11. There were no landing distances indicated on the operational flight plan for a contaminated runway condition at the Toronto/Lester B. Pearson International Airport (CYYZ).

 

12. Despite aviation routine weather reports (METARs) calling for thunderstorms at CYYZ at the expected time of landing, the crew did not calculate the landing distance required for Runway 24L. Consequently, they were not aware of the margin of error available for the landing runway nor that it was eliminated once the tailwind was experienced.

 

13. Although the area up to 150 m beyond the end of Runway 24L was compliant with Aerodrome Standards and Recommended Practices (TP 312E), the topography of the terrain beyond this point, along the extended runway centreline, contributed to aircraft damage and to the injuries to crew and passengers.

 

14. The downpour diluted the firefighting foam agent and reduced its efficiency in dousing the fuel-fed fire, which eventually destroyed most of the aircraft.

 

cheers

Peter

[FO_DAIHQ]

Danke für den interessanten Bericht:005:

 

Hat der FO eigentlich gesagt, wieso er nicht durchgestartet ist?Weil er war ja wirklich weit weg vom Tausendfußpunkt beim Aufsetzen?

 

Ciao

[D-EBIP]

Übrigens gibts auch noch eine Animation zum Angucken auf der Website, hier mal ein direkter Link zur Videoübersicht zum Vorfall:

 

http://www.tsb.gc.ca/en/media/video_database/air/a05h0002/index.asp