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Old 12th Nov 2008, 11:23
  #244 (permalink)  
CanExpat
 
Join Date: Nov 2005
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First of all, congratulations to the crew for getting everyone off with only a few minor injuries.

Secondly none of us have all of the facts unless some one secretly works for Boeing or the various AAIB and authorities involved. Therefore the debate on the merits of landing over executing a missed approach are some what premature.

What is irritating though are comments like the one sf25 posted above. The company sop to execute a go around below 500’ after suffering the failure of one engine is a perfectly sensible one. At typical landing weights 60-65T the average approach speed would be in the order 140kts with flap 40. At 200’ the height sited here the aircraft would be 0.6nm from the runway, on a 3Deg glide path. To land the pilot flying must in 15seconds:

1/ Identify the failed engine and correct with rudder
2/ Increase thrust on the operative engine while maintaining the centreline and glide path
3/ Retract flap to 15 and try to accelerate to Vref +20 (approx V2+20)
4/ Determine the new landing distance required at a performance limited airfield.

Then having flown the aircraft the pilot flying could get on with the other niceties like declaring a mayday (at CIA probably not easy), briefing/bracing the crew, having the fire and rescue services on standby in case of fire on landing. In this case you would probably carry out any recall and non-normal checklists after landing so I will lighten our pilot’s workload and omit these until after landing. If SF25 and the other experts could execute this drill in the 15 seconds they’d have above then they are better drivers then me.

Or you could go-around on the operative engine, enjoy the single engine climb performance above your 2.5% missed approach climb gradient. Sort out the problem, have everyone ready on the ground, brief the crew, find a longer runway if necessary at Fiumicino. You could enjoy the knowledge that both engines are almost entirely separate with the fuel being the only common denominator, probably why various authorities give 180 ETPOS approval to a number of twin jet operators.

If both engines did fail due to bird strike the crew did a truly outstanding job and the decision to go-around was taken out of their hands. Or maybe the commander exercised his rightful discretion to take what he/she thought was the best decision given the information presented at a very critical time.
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