I got a clear feedback from mro :
**“Unfortunately 5525 Airspeed sensors (themselves) have been reported with issues from OEM and we were receiving a lot of defective units. At some point it became time and funds consuming for us to produce this product in high quantities. So we decided to discontinue it. Apologies for the inconvenience this might have caused”
Any advise for another reference is welcomed. Personally I was quite happy with ms552
cheers