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MD-80/82

Posted: Sun Feb 05, 2017 10:32 pm
by brianbutler1984
Hi. Does anyone know why the Maddog makes a warning buzzer sound from the cockpit during flight?

Re: MD-80/82

Posted: Sun Feb 05, 2017 10:53 pm
by Starlionblue
It could be any number of things.

A flight warning system alert. These happen every now and then. For example a toilet smoke alert from someone using deodorant spray will trigger the master warning in cruise. Or something breaks.

Not MD specific but it could be the altitude warning. I've had this sound when we are high+heavy and we have to climb more. The plane sometimes "takes a break" and levels off a bit, probably due to a change in the temperature profile. This can trigger the altitude warning.

Re: MD-80/82

Posted: Sun Feb 05, 2017 11:00 pm
by brianbutler1984
Thanks for your reply, Starlion.

Re: MD-80/82

Posted: Mon Feb 06, 2017 7:36 am
by richcam427
Or, most often on takeoff, the trim system makes a whole heck of a lot of noise (and can be quite disconcerting to some new Maddog pilots)

Re: MD-80/82

Posted: Tue Feb 07, 2017 5:42 pm
by rjsampson
richcam427 wrote:
Or, most often on takeoff, the trim system makes a whole heck of a lot of noise (and can be quite disconcerting to some new Maddog pilots)


A buddy of mine is an MD driver who transitioned. He said the cockpit is noisy as s**t with bells and whistles, to the point he'd get headaches.

Re: MD-80/82

Posted: Wed Feb 08, 2017 6:26 am
by Max Q
Definitely sounds like the trim alert, actuate the trim more than she likes and you'll get the computerized 'stabilizer motion' warning as well.


Lots of buzzers, dings and bells in the -80, otherwise a quiet cockpit !

Re: MD-80/82

Posted: Sat Feb 11, 2017 12:52 pm
by Nicoeddf
@Max Q, you know by any chance what the threshold is of what "she likes" with regards to trim before the ugly voice cries stabilizer motion?
Degress/second?

Re: MD-80/82

Posted: Sat Feb 11, 2017 4:21 pm
by doug_or
I think this short video probably offers an example of what the OP is taking about (and a laugh, to boot).

https://youtu.be/X5Nddqf51pA

Re: MD-80/82

Posted: Sun Feb 12, 2017 12:25 am
by thefactorypilot
Max Q wrote:
Definitely sounds like the trim alert, actuate the trim more than she likes and you'll get the computerized 'stabilizer motion' warning as well.


Lots of buzzers, dings and bells in the -80, otherwise a quiet cockpit !

What you are hearing is the trim motion aural alert.

Re: MD-80/82

Posted: Sun Feb 12, 2017 12:28 am
by thefactorypilot
doug_or wrote:
I think this short video probably offers an example of what the OP is taking about (and a laugh, to boot).

https://youtu.be/X5Nddqf51pA

Oh my word that was HILARIOUS. My roommate is a maddog driver and he got a big kick out of it.

Re: MD-80/82

Posted: Sun Feb 12, 2017 4:53 am
by Max Q
Nicoeddf wrote:
@Max Q, you know by any chance what the threshold is of what "she likes" with regards to trim before the ugly voice cries stabilizer motion?
Degress/second?



Not sure on that, if you trimmed continuously for more than a few seconds you would get the stabilizer motion warning, it was common when you went from flaps 28
to 40 which was a big trim change but I don't know the exact criteria.


I do remember getting that warning once after i'd been trimming nose down for longer than normal with no response, the main trim had failed and we used the standby
on the pedestal.


You were always trimming on the -80, that undersized horizontal stabilizer didn't give a big range of control authority and not even close to the superb authority
and responsiveness of the magnificent B727.