Gents,

I flew formation with a 320 today that had an IAS 20 kts above mine in
welded wing.  The weird part was that the a/c had an IFR pitot/static
transponder cert less than a month ago.  Additionally, the internal static
port was found to be loose and the shop reattached it and certified the
installation.  Meanwhile the airspeed indicator was sent out for check out
and was yellow tagged with no problem found.

What is wrong with my buddies airspeed system?  Inquiring minds need to
know.

TIA for helping us mitigate trouble shooting.

Larry Henney
N360LH
IAS within a couple kts of a dozen other planes.