I am attempting to follow this approach chart;

http://www.arianedesign.com/modules/assets/master/upload19069-577_XBoeing737NORMALPROCEDURES.jpg

It shows the airplane in flaps 5 prior to the final approach. However, when flying in the sim, the "DECEL" point is too close to the final approach to meet the speed requirement.

If put the flaps down sooner than the DECEL point, the FMC locks on VNAV speed, messing up the flight path. (Come in way to high for the approach)

Other than using the speed brakes once crossing the DECEL point (which sometimes isn't even enough), what else can I do?

Is flaps 5 not supposed to be reached prior to the approach leg / VOR is captured?

Thanks.

I am attempting to follow this approach chart;

 

www.arianedesign.com/modules/assets/master/upload19069-577_XBoeing737NORMALPROCEDURES.jpg

 

It shows the airplane in flaps 5 prior to the final approach. However, when flying in the sim, the "DESCENT" point is too close to the final approach to meet the speed requirement.

 

If put the flaps down sooner than the DESCENT point, the FMC locks on VNAV speed, messing up the flight path. (Come in way to high for the approach)

 

Other than using the speed brakes once crossing the DESCENT point (which sometimes isn't even enough), what else can I do?

 

Is flaps 5 not supposed to be reached prior to the approach leg / VOR is captured?

 

Thanks.

What descent point? I think you may be misreading that diagram (note, that and other example approach diagrams are also provided in the NGX FCTM). The approach profile shown starts after the descent is complete. So the aircraft is at the same altitude as the final approach fix when you start to decelerate and extend flap. Deceleration is therefore not a problem.

What descent point? I think you may be misreading that diagram (note, that and other example approach diagrams are also provided in the NGX FCTM). The approach profile shown starts after the descent is complete. So the aircraft is at the same altitude as the final approach fix when you start to decelerate and extend flap. Deceleration is therefore not a problem.

 

I meant "DECEL", it shows on the map with all the other waypoints along the flight path.

I meant "DECEL", it shows on the map with all the other waypoints along the flight path.

The DECEL point will be far enough out from LOC intercept to allow you to decelerate in enough time. Do not extend flap until speed is low enough to do so. You shouldn't need speedbrake to slow down under these circumstances. In level flight with idle thrust the aircraft will decelerate sufficiently.

 

It sounds as if you are still descending as you approach the FAF, which isn't the same profile as the one you are trying to follow.

Passing the DECEL will automatically move the speed to the "UP" section of the speed tape. Once I get there, I extend flaps one. However, by the time I am turning to the localizer for the approach, I am not at flaps 5, as the aircraft hadn't slown down enough.

Passing the DECEL will automatically move the speed to the "UP" section of the speed tape. Once I get there, I extend flaps one. However, by the time I am turning to the localizer for the approach, I am not at flaps 5, as the aircraft hadn't slown down enough.

That should be OK. You don't really need to be at flaps 5 until shortly before the glide slope, and the usual VNAV path should allow that with room to spare.

At the glideslope you would drop gear and go to flaps 15. Then landing flaps when down to flaps 15 maneuver speed.

That should be OK. You don't really need to be at flaps 5 until shortly before the glide slope, and the usual VNAV path should allow that with room to spare.

At the glideslope you would drop gear and go to flaps 15. Then landing flaps when down to flaps 15 maneuver speed.

 

Thanks.. that is what I have been doing.