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Guest UweR

Arming speedbrakes on the ground for RTO?

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Hello Uwe,this is one of the misconceptions I had having been an Airbus driver for over a year.I used to think this applied to all airplanes and used to do this on the PIC 767 with disastrous results on t/off since I was departing with spoilers deployed! :-))Boeing planes extend automatically the spoilers once reverse thrust is engaged during an RTO, so there's no arming to be done unlike the Airbus planes.As for the amber message I wanted to ask the same question. Mine doesn't illuminate...but actually never did...only the green armed message shows up. I have noticed that it shows up even when they are fully deployed on the -700.Regards,Bjorn

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Hi Randy,on the DF 734 there used to be the amber "speedbrake extended" light.Don't know if it was accurate or maybe on the classics this is present...you guys sure know more about it then I. :-))Regards,Bjorn

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Hihi, I suspected something like that! Darned busses...Randy, another question arises then, which warning or annunciation is placed below the speedbrakes armed field?

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As Randy has said, there is no speedbrake extended light on the 737.You are probably mixing it up with the "Speed brake - Do not arm" light that is right below the "speed brake armed" light. It will illuminate if there is a failure in the auto speedbrake system or anything that affects its operation.Regards,Mark

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Jeez guys, there is a SPEEDBRAKES EXTENDED light on the 737NG. It's AMBER and it's on the F/O's side. It's the left annunciator above the ND.It is, however only illuminated if a fault exists, for example to warn you if you have speedbrakes extended with more than flaps 10 or below 800 ft RA, or on the ground when the SPEED BRAKE lever is down but the ground spoilers are not stowed.Randy, you can keep your shirt though, I don't want it :)Izhttp://www.planetizzy.com/files/spb.jpg

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Oops!Okay my mistake with assuming the NG is similar to the classic in that regard (the comparison sometimes does work :-) )On the classics you only have the "Do not arm" light. Or maybe it's a company option?Mark

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That guy should broke the ground speed record for 737 :-wedge Sometimes fsmeteo gives me same winds too, but from right ahead, I can feel I'm aging :-badteeth

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Yeah, that guy is me :) However, the 737NG also has a SPEED BRAKE DO NOT ARM light which indicates a fault in the auto-speedbrake system. It means that you cannot put the lever in the armed detent to prevent inadvertent auto speedbrake deployment in flight.Iz

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Hi Bozhan, not anymore, unfortunately :) My company has phased out all 757s, so now I'm on the 737-700/800. And I'll be bugging you guys on the 73!

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Yeah, gotta have at least point-eight!! :) Normal cruise speed for us on the 737 is usually around .792 anyway.

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Arming SB prior to T/O will give you takeoff warning. Simulated correctly by PMDG.Pulling throttles back to idle during takeoff run will activate RTO. Next: Operating reverse thrust will chick SB lever into armed pos - deploying spoiler panels.Speedbrake do not arm light may be steady on. Meaning what it says. A warning to pilots that there is something wrong with the system, the spoilers may extend if you put lever in armed pos - so leave it in down detent!A significant difference between classic and NG - If NG airborne sense ground for ground spoilers (ground spoilers may extend in air = crash) the takeoff warning will be activated. Guess a not well trained pilot will assume that there is something wrong with takeoff warning -since it is activated in air, and just pull the C/B!eker

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That's what I get for listening to a certain pilot and not looking at the AOM UGH. I stand corrected so to save face here (pretty hpeless task mind you) DREEMFLEET made the light lightup for the speedbrakes extension.... UGH (Anyone see my ROCK?) [h4]Best Wishes,Randy J. Smithhttp://www.precisionmanuals.com/images/betaimg.jpg

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Eker, that's not completely true about the ground spoilers. They can easily extend in the air, just pull the lever back over the flight detent (without crashing even :) ).

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