On 2003-12-03 12:02:48 -0800, Slav Inger said:

They need to know
what procedures need to be followed when overhauling the system. All
I've been able to find so far is AC 70/7460-1K which talks about putting
up obstruction lighting, but it doesn't seem to address their question.
Has anyone come across anything like this? Thanks in advance.

I'd say a call to the FSDO is in order. They will certainly have a much more
definitive and authoritative answer than any of us is likely to have.

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Larry Fransson
Seattle, WA