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Old 3rd November 2001 | 01:19
  #21 (permalink)  
scanscanscan
 
Joined: Sep 2000
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From: min rest
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I recall an Air France 747 did a low speed abort at Bombay rw27 and cleared and stopped on the runway turn off, to sort things out. The brakes were hot (as was the oat) and they caught fire.
Two fire tenders were dispatched, and one turned over when it did a "go direct" fully tanked, over the soft grassland.
The remaining fire tender refused to approach the 747 as all four engines were still running.
The fire progressed and the 747 was destroyed.
The fire tenders were unable to communicate with the 747 crew by radio.

At Delhi a new 747 again Air France aborted on Rw26 and slightly over ran the runway,all the passengers exited uninjured by the L1 door step (about 2ft) the 747 having ploughed into the soft earth clearway. This time there was no brake fire the wheels being several feet under the earth.
I believe this 747 was a write off.

At CDG a GF L1011 had a main tyre failure on takeoff, shortly followed by its axle mate,( the double pop sound) during the abort the remaining tyres on the same side were destroyed, and the gear leg ploughed a furrow in RW27 effectively slowing and then stopping the aircraft.
The GF L1011 tyre problems were cured I recall, by useing only new tyres,slightly increasing the pressures, and monitoring these pressures to ensure the correct inflation after every landing.
Crews were instructed on straight line taxi speeds and brake application methods, and taxi speeds in turns and the degree amount of these turns allowed.

Regarding brake application on Boeings 767/757 during aborts.
The following points I recall, and hopefully they may help.
Sometimes it is forgotten that on top of the rudder pedals are brake horns, and the feet have to be lifted well up onto these horns. They are positively and agressively rotated at full force by the pilot, with the ball of his feet,during serious high speed aborts, simple toe pressure will not achieve the stopping distance.
Often also forgotten is the immediate manual follow up of the speedbrake lever after smart closure of the throttles and the ATs disconnect.
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