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Guest autothrottle

Below FL100

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Hello, I have a question about the 737 PMDGIn descent, after having passed below 10 000 fts, the PA disengages VNAV and set LVL CHG automatically.Why does it do it?Thanks.

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Hi,If in VNAV PATH DEScent, you are probably violating the stricter speed limits applied after passing 10,000 feet.Above 10,000 feet you can overspeed up to 1 knot below the barber pole on the speed tape before VNAV disconnects. Below 10,000 feet VNAV disconnects when you're 10 knots (Correct me if I'm wrong here Randy! ;-)) above the speed restriction. Speed restriction is usually 240 KIAS if not altered.Also do a search on this topic in the forum as it has been extensively dicussed in the past.Hope it helps,

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