Drain holes

[jmvolpp]

With all our current interest in drain holes and such, I'm compelled to revisit SB 78-001, which in the case of N44305, was complied with 2 years ago at the pre-purchase/annual inspection. Since I've never noticed any evidence (seepage) similar to the LPS3 still exiting the wing strut drain holes, I'm thinking it might be prudent to reapply Tubeseal, but can't imagine being able to fill the struts adequately, while still attached to the aircraft, with only one hole at the bottom. Would it not be logical to drill a top hole as well, then fill to overflow, etc?

While on the drain hole subject, are all the hole locations listed for the F19 present on the BC12D?

Mike V.

[Guest]

Re: Drain holes

With all our current interest in drain holes and such, I'm compelled to revisit SB 78-001, which in the case of N44305, was complied with 2 years ago at the pre-purchase/annual inspection. Since I've never noticed any evidence (seepage) similar to the LPS3 still exiting the wing strut drain holes, I'm thinking it might be prudent to reapply Tubeseal, but can't imagine being able to fill the struts adequately, while still attached to the aircraft, with only one hole at the bottom. Would it not be logical to drill a top hole as well, then fill to overflow, etc?

While on the drain hole subject, are all the hole locations listed for the F19 present on the BC12D?

Mike V.

Hi Mike,

Wouldn't that have been done during the strut AD compliance?

It is required by the AD.

Dave

[T-Rex]

Re: Drain holes

I don't know this for fact but was told at a seminar in Ohio that linseed oil applied in that manner will "creep" vertically arround a whole tube and cover the entire surface even if it is not rotated. Can anybody confirm this?

[jmvolpp]

Re: Drain holes

I was remiss in not clarifying that SB 78-001 refers to the landing gear tie struts. I'm all too familiar with the requirements of the wing strut AD which, thankfully, I won't have to revisit for another 4 years!

Mike V.