Here is the link to the China airlines incident:
China Airlines 747SP Upset
Not quite 7g...
The maximum vertical acceleration forces recorded during the descent were 4.8Gs and 5.lGs as the airplane descended through 30,552 feet and 19,083 feet, respectively. The 5.1G peak value was recorded on a portion of the tape where data had been lost originally and subsequently recovered, but this value is consistent with the adjacent data which show an arresting of descent rate and a pull-up.
Here is Tex Johnston in action:
707 Barrel Roll
