Speedbrakes / Go Around

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24th May 2001, 17:36

#1 (permalink)

reverserdeployed

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Speedbrakes / Go Around

Just a quick question about going around in an airliner...

It's quite likely in a go-around situation (obstacle on the runway etc) that you will touch the ground with the main gear, which will deploy the spoilers. Do they retract automatically upon application of TOGA power or do you have to do it yourself?

I would have thought that any delay in getting them in would leave you in deep doodoo on a short runway?

24th May 2001, 18:44

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everybody

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On the Avro RJ100 it's automatic, but you back it up with manual selection to make sure.

When we do touch and go's for training we switch the automatic deployment system off so we can get going straight away.

24th May 2001, 19:08

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On the 757, they retract automatically -- even if you bounce upon landing, they will retract momentarily.

24th May 2001, 20:15

#4 (permalink)

SLT

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Same on Airbus - don't think they auto retract on a bounce though - TOGA selection does it.

24th May 2001, 20:24

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Black_Dawn

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In the MD82 is automatic:the advancing throttles do the job of retracting the spoilers.

24th May 2001, 20:48

#6 (permalink)

Lightoff

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On the CRJ and also on the 767 (suppose most other Boeings as well), the spoiler deploy logic requires BOTH thrust levers to be at idle for ground spoilers to deploy - so in your scenario they would never deploy in the first place with G/A thrust set before the momentary touchdown.

24th May 2001, 20:52

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ragspanner

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SLT correct on airbus bounce,with rear main- wheel rotation in excess of 50kts the 'logic' will keep them locked out.

24th May 2001, 21:10

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dv8

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dito F100 TOGA pops them back in.

24th May 2001, 23:25

#9 (permalink)

Cough

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737 - Touch the RH wheel, they deploy on landing. Apply power, and they will retract. (No effect on a bounce)

CCCoooo....ugh

25th May 2001, 04:43

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pterodactyl

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Bit different on the DC9-30. Spoiler retracted after deployment on touchdown if the LEFT thrust lever was advanced. If doing a go around close to the ground with momentary wheel contact and using RIGHT engine with LEFT thrust lever at idle it was necessary to manually release the spoiler handle. Simple enough, just tap the handle down and the spoiler lever flew to the stowed position. BUT you needed to be prepared to act smartly.