THRUST reading on PFD during descent...

[JSACKS]

I generally descend in VNAV PATH with a valid flightplan. So far, everything has gone pretty well on my familiarization flights. However, I note that once the descent has started, the annunciation in the thrust area of the PFD reads ARM on the way down, implying that I haven't selected a valid thrust mode. Why is this happening when I am in VNAV PATH--or is it a correct annunciation?Appreciate guidance, thanks.Jonathan

[Guest captbulldog 2]

When the throttles are idle they go into ARM and V/S is used to control your speed. If your speed starts to fall the thrusts will be used. Everything is normal!

[JSACKS]

Phew! again, so I am not being an idiot.Thanks for reply.Jonathan

[crvm]

The reason it is in ARM is because PATH is the target in VNAV PATH, it was computed @ idle and will not add throttle unless you become too slow or have a restriction or change modes...SO think VNAV PATH=PATH no SPD and VNAV SPD=SPD not PATH..Best Wishes,[h4]Randy J. Smith[/h4]http://www.rawbw.com/~bdoolin/shinault/southparkcartmad.gif[h3]PMDG 747![/h3]Caution! Not a real pilot, but do play one on TV ;-)ASUS KV8 DLX | AMD 3200 64 | 1 GIG PC 3200 DDR | GIGABYTE 5700 ULTRA | ViewSonic VP192b 19" |

[JSACKS]

Thanks again, Randy, it's all beginning to actually make some sense to me (!)Jonathan

[Guest meyomyx]

>>Thanks again, Randy, it's all beginning to actually make some>sense to me (!)>>JonathanThat's the point at which I start to worry :)