Okay a few talking points:
1) Wouldn't Connie Edwards have been the ideal person to hire for technical advice for this film? WHo did they consult?
2) The airplane wasn't having an emergency, the pilots chose to put it into the water. It was in perfect airworthy shape a week ago.
3) Were the pilots current in sea operations and how many water landings had they done in type the last 90 days? (Just curious since the PBY-6A wasn't seaworthy.)
4) Because the PBY-6A had a gross weight of more than 12,500 lbs., it is required to have a Type Rating for the PBY and an ATP. The PIC would have had these and the SIC would have to have his currency sign offs as well. Plyus this was a commercial endeavor so that increases the requirements. Who signed them off for water landings?
5) A lot of work went into getting that 70 year old plane airworthy and ready to work. Did the owner or mechanics tell the pilots that is was seaworthy? Most old floats and amphibs leak like crazy unless they have had a lot of repair. Would it have been a good idea to put it in water even with the drain plugs installed?
6) Are the drain plugs and other sea equipment on the walk-around preflight inspection and before take off checklist? Wh gave the green light to risk the aircraft?
7) Why would you put an unpainted bare aluminum flying boat in salt water? The salt gets into the rivets, overlapping skins, etc. A death sentence eventually to the aircraft"s airworthiness.

Did the owner know how his aircraft was going to be used?
9) Did the studio buy the aircraft with the intention of ruining it? Maybe it was cheaper than hiring the special effects guys.