In December 2005, Australia decided to upgrade its CH-47D Chinook fleet, in preparation for use on the front lines. Afghanistan’s high altitudes and sometimes-scorching temperatures reduce rotor lift. That made the Chinooks a far better choice than upgrading the ADF’s S-70 Black Hawk helicopters, whose reduced carrying capacity would limit their tactical uses. Those CH-47D Chinooks have gone on to play an important role in Afghanistan, amidst a general shortage of useful helicopters. Now, Australia seems determined to supplement its older CH-47D fleet with new and improved CH-47F models, which feature more modern electronics, uprated engines, and numerous other improvements.
The question was when the DSCA request would become an actual contract. That question has just been answered.