Check out these USMC and USAF C-130 Vietnam era crashes -- these were all in the War zone and its feeder ABs on Taiwan, Okinawa and Guam but not elsewhere -- on this website: https://en.wikipedia.org/wiki/List_of_accidents_and_incidents_involving_the_Lockheed_C-130_Hercules#1960s, and then Google their serial numbers for more details:
8/24/65
1/9/66
3/26/66
12/15/69
9/30/74
By my count, those five accounted for half (5/10) of the C-130 losses during 1965-75 in the War zone that were clearly attributable to materiel failures, and not to other accidental mishap causes. Other than this bulletin board, I have not been able to find any reference to a general "fix" that was done to eliminate the possibility, and the fact that the above crashes were spread over nine years and models A (1), B (1), E (2), and F (1) suggest that if there was one, it might not have been universally made.
