Known Defect Test Piece part 2

Known Defect Test Piece Part Deux

In the March 2016 Penetrant Professor we discussed known defect standards for penetrant inspection and introduced a new star burst type panel, the Hoffman Panel. We commented that this panel at that time had not been officially approved to the Pratt & Whitney TAM 146040 drawing. We have been advised that in this short time the Hoffman Panel, part number PT-Guard, has now
been approved by Pratt & Whitney. Panels that are half chrome and half grit blasted will carry the TAM # 146040-1, and the panels that are fully grit blasted will carry the TAM # 106040-2.
The Hoffman Panel U.S.A. distributors are: