PPRuNe Forums - B737 Trailing Edge Flap Asymmetry

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wilco77

17th Oct 2019 04:21

B737 Trailing Edge Flap Asymmetry

QRH question: "Set the flap fever to the nearest detent that is equal to or less than the smallest indicated flap position"

1.So if my TE needles are split during retraction due to Assym (L--5 / R -- Btw 2 and 1) Do I set the flap lever to 1?

2. If my TE needles are split during retraction due to Assym (L--15 / R -- Btw 5 and 2 needle being closer to 5) Do I set the flap lever to 2?

thanks

Wilco

Too Few Stripes

17th Oct 2019 07:44

That’s how I would read it.

Antonio Montana

17th Oct 2019 09:21

Same here, don't over think it

Tomaski

17th Oct 2019 12:48

Agree with other replies, but I’ll add that if the asymmetry trip system is working properly, the flap should never get so far out as example #2.

Johnny F@rt Pants

17th Oct 2019 14:14

Quote:

if the asymmetry trip system is working properly, the flap should never get so far out as example #2.

They won’t get anywhere near that far out of kilter unless there is a fault in the protection system. However, to answer your question, you do as directed by the QRH and set the flap lever to the lowest flap setting, this helps you identify what speed to set for your approach.

IFixPlanes

17th Oct 2019 15:02

Quote:

Originally Posted by wilco77 (Post 10596319)

QRH question: "Set the flap fever to the nearest detent that is equal to or less than the smallest indicated flap position"
1.So if my TE needles are split during retraction due to Assym (L--5 / R -- Btw 2 and 1) Do I set the flap lever to 1?
2. If my TE needles are split during retraction due to Assym (L--15 / R -- Btw 5 and 2 needle being closer to 5) Do I set the flap lever to 2?

The split to get into Flap Asymmetry is not that high.
If L is 5 than R is more than 2.
If L is 15 than R is close to 10.

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