Have to agree with Tewksbury on this one.

Was it Death Jet with Big Airways by any chance. Went on for months, eventually sorted by replacing both the hydraulic reservoir pressure regulator and the relief valve.

I think that was a -200 series though. Can't remeber if the -300 series is similar.:ok:

LEM,

Won't let you off that easy mate.

You started it, now finish it.

I for one would like to know, maybe others.:)

Of course I'll keep asking the engineers for the latest news..

I swear I'll let you know asap.

Voilà...

I was told that was a fractured airconditioning duct, vibrating and resonating!

Ps: yes we all are a bit disappointed, as we liked our personal theories...

Next time better luck!

Thanks all for your inputs :D

Ok Lem which 1 ? Was it the 1 that leads into the heat-exchangers ?

LEM,

Thanks for putting in the effort to find out.

There used to be a problem with a beehive type airflow straightener that would crack and cause noise. Might be the same problem.

Safe days,

MW:ok:

Unfortunately I couldn't get more details.

Sorry. I'll continue to ask, stay tuned! ;)