That's a moronic sentence, written in typical drive-by style.
The batteries were not due to be replaced until June, and I'm sure the replacement schedule doesn't wait until the very end.
Then there is this..
On Friday, Dukane Seacom Inc president Anish Patel told CNN that the recorders were scheduled for battery replacements in 2012, but they were never returned for the overhaul.
so, it was due in 2012 and not done by Dukane.. Dud someone do it? or where they way past due?