Zalt,
Did the Cougar Crew comply with the Checklist?
How many times did the Co-Pilot tell the Captain the Checklist's last entry said to Land/Ditch?
Was there a 30 Minute Run Dry Time required by Certification?
Did the Aircraft receive Certification?
Have you read the Cougar Report in detail?
Under Section 4.2 ACTION REQUIRED, The Accident Report lays out the basic problem with all of this 30 Minute Run Dry Time issue. The Authorities amended the Requirement to allow the use of the definition "Extremely Remote" and by doing so undermined their own Certification Standard.
The FAA also allowed the use of the Pilot Activated Isolation system and in the Cougar case that was of no use as the entire contents would have leaked out even had the System been activated due to the Filter being the cause of the leak.
http://www.tsb.gc.ca/eng/rapports-re...6/a09a0016.pdf