Engine(?) Noise 737-300QC
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Engine(?) Noise 737-300QC
Was on a flight (as SLF) recently on a 737-300 seated just aft of the wing (seat 16A I think) and noticed an usual noise in the cabin (on both the outbound and return journey a week later) that I assume is "normal" but having never heard before piqued my curiosity about what it is.
I know there are probably literally hundreds of possible causes of this - but figured it might be something common that has an easy explanation :p
On the ground as the engines were started and we were pushed back there was a repeated (4 or 5 times followed by a pause and then repetition) "clunking" (for want of a better word) which was accompanied by a vibration that could be easily felt through the floor. This continued until the engines had spun up a bit. The same noise was present after landing as we approached the stand.
I was on the same a/c for four different take offs and landings in the space of a week and it did this each time, yet other 737s I've travelled on haven't (or at least I've been unaware of it)
I'll add that I was travelling with a nervous passenger who immediately asked me in a panicked tone "what's that" to which I obviously replied ... "oh, it's normal on this type of plane" to reassure them ... ;)
(on an entirely unrelated note this flight ended with the announcement "Cabin Crew - Doors to automatic and cross-check" which concerned me more and hoped all the pax would be treated to a demonstration of how the slide deployed and generally make disembarking rather a lot more entertaining ... alas they did what they were supposed to as opposed to what they were told to ;))
I know there are probably literally hundreds of possible causes of this - but figured it might be something common that has an easy explanation :p
On the ground as the engines were started and we were pushed back there was a repeated (4 or 5 times followed by a pause and then repetition) "clunking" (for want of a better word) which was accompanied by a vibration that could be easily felt through the floor. This continued until the engines had spun up a bit. The same noise was present after landing as we approached the stand.
I was on the same a/c for four different take offs and landings in the space of a week and it did this each time, yet other 737s I've travelled on haven't (or at least I've been unaware of it)
I'll add that I was travelling with a nervous passenger who immediately asked me in a panicked tone "what's that" to which I obviously replied ... "oh, it's normal on this type of plane" to reassure them ... ;)
(on an entirely unrelated note this flight ended with the announcement "Cabin Crew - Doors to automatic and cross-check" which concerned me more and hoped all the pax would be treated to a demonstration of how the slide deployed and generally make disembarking rather a lot more entertaining ... alas they did what they were supposed to as opposed to what they were told to ;))
Sounds like this:
http://www.pprune.org/passengers-slf...what-they.html
Forum FAQ's always useful - I looked it up about a year ago because I don't remember having heard it before. Not heard it on a boeing before though.
http://www.pprune.org/passengers-slf...what-they.html
Forum FAQ's always useful - I looked it up about a year ago because I don't remember having heard it before. Not heard it on a boeing before though.
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Thanks L4key - i'm reasonably familiar with that noise .. the PTU on the Airbus .. sounds like a muffled dog bark 
This is definitely different but I suppose it could be something similar manifesting itself with a different noise... I've never heard it on a Boeing before either - hence the confusion..
This is definitely different but I suppose it could be something similar manifesting itself with a different noise... I've never heard it on a Boeing before either - hence the confusion..
