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Takeoff Warning Sound

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Love the PMDG 737! For some reason, I cannot seem to find the reason that when I advance the throttle for takeoff, I get the warning beep. There is no display anywhere indicating a problem... I've programmed the FMC, set the flaps, proper N1 derate, trim, (not sure how to do this accurately), auto-spoiler set, autobrakes set RTO, lights on, APU off, yaw damper on (have tried it off, no luck), generators set, fuel pumps set, pressurization set, and on and on... The warning stops immediately as the wheels leave runway... I feel like I'm at a dead end... Any ideas?FS9 with Vista... No problems on the PMDG MD-11, and 747, PSS 757 or 777, or the LDS 767, Dreamfleet 727, or stock aircraft... The 737-700/600 only.. ThanksHorace Riley

trim, (not sure how to do this accurately), auto-spoiler set
Hello, it looks to me like the spoilers are the problem. What exactly do you mean with auto-spoiler? You arm them? In real life they deploy automatically when thrust levers pushed to iddle. Just leave them down and I think that will silence the warning.And the trim has to be within the green band. You can see it on the pedestal left of the speedbrake lever.Regards
Hello, it looks to me like the spoilers are the problem. What exactly do you mean with auto-spoiler? You arm them? In real life they deploy automatically when thrust levers pushed to iddle. Just leave them down and I think that will silence the warning.And the trim has to be within the green band. You can see it on the pedestal left of the speedbrake lever.Regards
Could also be improper flap setting.

George Morris

 

Boeing777_Banner_BetaTeam.jpg

Could also be improper flap setting.
YES! your exactly right. Dont start off with full flaps DO start off with ONLY 1 notch this solves the problem for me and you can add a notch of flaps every few seconds.

Sorry boeing7478... I don't understand your plan there.You set up your flight using the FMS, and takeoff parameters. You can enter the required flap setting for takeoff (dependent on TOW, runway length, weather, temperature and so on...) Flaps for take off can be anything from 1, 2, 5, 10, 15, 25, though NOT 30 or 40.You do not want to be increasing the flap setting on take off or climb out. The whole point is to have the correct flap setting for takeoff prior to setting takeoff thrust, then retracting the flaps in accordance with the climb speeds...Andrew

Andrew Entwistle

  • Author

Thanks all for the suggestions. I may have been thinking of RTO on brakes, and said Auto-spoilers. I know the spoilers have to be armed, (in flight), and will automatically deploy on wheel touchdown. As for flaps, have been using 5, or 15 deg. for takeoff, according to recommendations by Utopia, to give a de-rated TO and flap setting. I've checked and re-checked FMC to see that it is accurate, pressurization, packs, fuel feed settings, etc. Puzzled! If I find out what's going on, I'll post it here... Thanks again...Horace Riley

  • Author

All seems to be OK... Did two different things in pre-flight...1). Thought about the suggestion by boeing 7478, and dialed in the flaps one increment at the time... Flaps 1, (wait until it is finished), Flaps 2 (again wait until it is finished), then Flaps 5... Of course if you want Flaps 15, use the same procedure of making one notch at the time...2). Left the trim as-is... Did not attempt to dial in a different setting. It's easy to change the trim on climb-out as needed. I guess I had been used to setting the recommended trim in the LDS 767, PMDG 747, etc.I guess these two things fixed the problem, (or maybe just one of them) and now I really am enjoying the 737 again! Thanks guys for the suggestions...Horace Riley

Trim should be around 4,5 to 5 as stated in youre FMC (when the input is correct) . Flap 5 is normal, only on very short rwy's you might want flap 15 (for TO).When you use FSPassenger and you've saved the flight with it, you must go back to your Cessna en then reload the NG. Otherwise the NG remembers the values of FSPassengers and those won't coop without using FSP and you'll get cg warnings and thus a trim problem.John

There is really no need to set the TO flaps one increment at a time, waiting for the flaps to transit to that setting before moving the lever... I need flaps 5, hit the flaps extend button 3 times... flaps 15? 5 times... quickly, no pauses...You should get into the habit of setting the trim to that given by the FMS...Helps with rotation at the calculated speed...Andrew

Andrew Entwistle

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