Below is a picture of the grooving on the wrapper plates which resulted in them being removed.  The corrosion visible above the line of rivet holes and the slit on the curved end is not uncommon. The corrosion has eaten about 75% into the thickness of the plate demonstrating why it has to be replaced.
Below is a picture of the grooving on the wrapper plates which resulted in them being removed. The corrosion visible above the line of rivet holes and the slit on the curved end is not uncommon. The corrosion has eaten about 75% into the thickness of the plate demonstrating why it has to be replaced.
Credit: Dick Bellchambers, 11 May 2005