Speed tape V speeds - B757/767
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Joined: Aug 2001
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From: UK
Speed tape V speeds - B757/767
On those aircraft with speedtapes on the EADI, V1 and R appear to indicate the speeds entered into the FMC.
According to the OPS manual these speeds will blank 2 minutes after takeoff.
However, what happens on our simulator is that the CDU takeoff page blanks the V speeds after 2 minutes, but the V1 and R indications remain on the EADI until the A/C has passed 210kts, at which point they disappear.
I have pilots stating this is incorrect, but engineers stating this is correct.
I tend to agree with the engineers, since the portion of the speed tape containing the V speed indication is not normally visible after passing about 190kts. Therefore, you would only know if the indications continued to remain when the A/C stays at a speed of less than 210kts for more than two minutes. Surely this would only occur in an engine out scenario?
Can anyone enlighten me with the facts, not supposition please.
According to the OPS manual these speeds will blank 2 minutes after takeoff.
However, what happens on our simulator is that the CDU takeoff page blanks the V speeds after 2 minutes, but the V1 and R indications remain on the EADI until the A/C has passed 210kts, at which point they disappear.
I have pilots stating this is incorrect, but engineers stating this is correct.
I tend to agree with the engineers, since the portion of the speed tape containing the V speed indication is not normally visible after passing about 190kts. Therefore, you would only know if the indications continued to remain when the A/C stays at a speed of less than 210kts for more than two minutes. Surely this would only occur in an engine out scenario?
Can anyone enlighten me with the facts, not supposition please.
