Missing gas in the right tank?

[PeterRus]

I fill up both tanks after each flight. What I noticed is lowered level of fuel in the right tanks when I come back after a a couple of weeks. I quickly checked under the wings for blue streaks and didn't see any. Any words of wisdom?  1997 MSE. 

Started recently, didn't have the issue before about a month or so ago. 

Edited Monday at 03:13 PM by PeterRus

[Jsno]

The sealant on top could be deteriorated and it will evaporate.  Also check inside at the wing root for a leak into the cabin.  Pull some panels at the leading edge and check the front spar.

[Ricky_231]

[EricJ]

It's probably leaking into a space in the wing and evaporating off.   Mine does that on one side and I know just how much to fill it to keep it from leaking down again.   Sometimes if it leaks into the wing it'll run down to the wing root and you'll be able to smell it in the cabin.   If you smell fuel in the cabin, that might be what's happening.

You could open the inspection panel(s) under the wing just outside of the tank and see if there's evidence of a leak into the wing.   You'll see the usual blue dye streak, maybe running down a rib or something.

 

[Marc_B]

If you were remotely considering a tank reseal in the next year or two; I'd be calling now to get in line...

[Vance Harral]

2 hours ago, Marc_B said:

If you were remotely considering a tank reseal in the next year or two; I'd be calling now to get in line...

While this is reasonable advice, I'm pleased to say the lead time on tank reseals isn't quite as bad as people seem to think, unless you're simply unwilling to have it done anywhere other than Weep No More in Willmar.  Dmax is doing a strip-and-reseal on our airplane starting next week, via an appointment we booked in December; and this thread details a good experience by a Mooney owner at Wet Wingologists, who worked him in on one month's notice.  Not disputing that Weep No More is the defacto standard, king of the hill and all that.  But there are other choices with similar equipment, reputations and warranties, and much shorter lead times.

[Hank]

There are four busy reseal shops; in geographic order, North to South:

• Weep No More in Minnesota 
• Don Maxwell in East Texas
• Houston Tank Specialists in Houston
• Wet Wingologist East in Ft. Lauderdale (Edison did a great job on my tanks in 2009)

If you're on the Left Coast, there's an MSC in Oregon whose name escapes me right now (Troutdale, OR?) who may do tank work, or know someone else who does.