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Autothrottles departure to a low altitude operation.

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Autothrottles departure to a low altitude operation.

Old 15th May 2020, 03:38
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Join Date: Aug 2008
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Autothrottles departure to a low altitude operation.

Ladies and Gents, I have a low altitude autothrottles SID operation question for an airport initial departure procedure. You are executing a takeoff with autothrottles to a low altitude (1500ft ) on an initial SID departure. What is the correct and proper way to manage the autothrolles and speed, so that the pilot does not climb through the published initial 1500ft altitude on the SID and also does not exceed a published speed limit, if assigned. (i.e. speed 165 kts)
[ Example - KTEB (TETERBORO, NJ, USA) [b]"RUDY 6 RNAV DEPARTURE RWY 24 (RUUDY6.RUUDY) WITH AN ASSIGNED SPEED INCLUDED" ]

bluehawaii is offline  
Old 15th May 2020, 17:37
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Join Date: May 2000
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VNAV. Monitor closely to ensure it does what you expect it to do.
Intruder is offline  
Old 15th May 2020, 20:54
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Join Date: May 2005
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Positive climb - gear up
400ft - check Lateral mode is LNAV or HDG as desired
As soon as possible, consistent with performance regulations - select Vertical mode to VS 500fpm and Auto throttle mode to SPD 165kts
1500ft - Check Vertical mode is ALT Capture and Auto throttle is speed mode 165kts as expected.
eckhard is offline  
Old 15th May 2020, 21:32
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Join Date: Mar 2001
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On the Boeing as Intruder said, VNAV should take care of it. On the Bus, autothrust engages with thrust reduction, usually 1000ft in the airlines i have flown for and the speed limit is taken from the database so will stay at 165. Therefore AT will keep that speed.
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Old 16th May 2020, 02:10
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Thanks Intruder, Eckhard and Denti for sharing your professional flight guidiance system procedure and knowledge.
bluehawaii is offline  

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