Why do you sometimes hear the "bling" sound just like 15 sec. after take-off?

Question

you know, the same sound as when someone presses the button to the stewards.

seen among others here:

http://de.youtube.com/watch?v=sMCgZktTLQU&feature=related

Answer 1

Iberia operating procedures!

It has a meaning not intended for civilians to know.

Answer 2

This is the sound of the emergency lights. They are switched on and off together with the landing gear going up and down!

So in this case, the landing gear went up so the emergency lighting went off. That's when you hear a sound.

You hear the same sound when the landing gear goes down and the emergency lights go on.

This was no passenger call and not a sterile cockpit sound.

Answer 3

Fifteen seconds after takeoff, and it's probably a passenger pushing the call button. That's what I would guess in the video- most flight crews aren't reaching for a seatbelt sign (which creates a similar ding) right after takeoff... they have a lot of other things going on! The seatbelt sign was definitely on for departure (or should have been!)

Many airlines use the signal though as a "sterile cockpit" signal for flight attendants. Next time that you fly, pay attention to when you hear it. A lot of times you'll hear a chime about 2-4 minutes after takeoff (passing through 10,000 feet). You might also hear it descending through 10,000 feet, or right before you start the approach as a final signal to the flight attendants that they need to be seated.

Answer 4

its because the seatbelt light is turning on.