OK, I finally dug through my box of books to find Sharks of Hawaii; Their Biology and Cultural Signifigance, Leighton Taylor, '93 University of Hawaii Press. This book includes the Register of Shark Attacks in the Hawaiian Islands, 1779-1992, by George Balazs (NMFS turtle dude).
Going back from '92, the first reported scuba shark attack is Feb 17, '90. Roy Tanaka failed to return with his partner from spearing parrotfish (200 yds off shore, 40fsw), 9:30 pm. 22' boat nearby had overturned a short time earlier after being broadsided by a wave. His tank, backpack, light and mask were found on the bottom but not retrieved. Body with amputated right arm sighted by helicopter 3 pm the next day between Makai Pier and Rabbit Island. Large TS consumed all but torso before retrieval. (Tom's story above)
Next; Oct 14, '89, Ray Mehl, Jr., abruptly disappeared while diving as a novice with his partner (750 yds off shore, 27fsw) near the discharge pipe at Kahe Point (e-beach). Unusual behavior exhibited by parrotfish just before disappearance. Time of event was 4:30 pm, 25-30 foot vis. Body located the next morning 200' to the west, large TS consumed the remains before recovery.
May 24, '81, Roger Garletts went missing while scuba diving off Ha'ena Beach Park (North Shore Kaua'i). Depth 60-80', only scuba gear recovered, including shredded wet suit bearing numerous tooth marks. Victim reportedly spearfishing in murky, choppy water.
In '76, off Lahaina, Danson Nakaima apparently passed out while black coral diving (180fsw). About 30 large sharks seen near partially devoured remains. Earlier in '76, Stephen Powell went missing while scuba diving near Koloa (Kaua'i), lower remains of body recovered.
I got that book brand new when it came out. I was free diving extensively off the North Shore of Kaua'i at the time and did extensive research into shark attacks that first couple years in the Islands. There was another book I read around then that seemed to indicate non-spearfishing and non-dead already attacks on scuba divers were a couple white tip reef sharks and one hammerhead biting forearms of photographers who cornered them for pictures.
George would be the one to contact for more recent data, still with NMFS on Oahu.