Tomorrow will be the 10th anniversiary of Cougar 491. I looked back to this thread and the question on the oil filter caught my eye. When did the filter design get changed if at all to reduce the number of bypass conditions being found?

If only Sikorsky has made that change out of the studs an AD instead of a SB my lost friends would still be here.

if you want an insight into how this tragedy has affected the families of those lost souls there is a book by Rod Etheridge called “18 Souls the loss and legacy of Cougar Flight 491”, ISBN 978-1-7752345-0-0,