CASA have recently released two new AD's for DH types 60 and 83.

DH-60: http://www.casa.gov.au/ADFiles/under/dh60/DH60-010.pdf

DH-83: http://www.casa.gov.au/ADFiles/under/dh83/DH83-006.pdf

These new AD's are very similar to those released for the Tiger Moth in 2014.