[Wil H]

There are in fact FAA AD notes for the 747 on this issue.

Duh! the AD was issued as a result of the "findings" that blamed the center fuel tank theory of TWA 800, so it can hardly be considered corroborating evidence can it?

[mordo]

Well Duh! You are right! But not absolutely
IF there are no prior AD's or service bulletins on this.
If there are, I'll try to get them for you ;)