Tip tank fuel quantity indication

[Christopher Hufnagel]

Hi all,

My left tip tank fuel quantity indicator has suddenly decided to read 3/4 to 1/2 full when actually full. It remains at this point on the indicator until the fuel burn approaches that point (by flight time and fuel used on the Shadin). It then indicates a decrease at a normal rate, matching the right tank towards empty. It still reads correct at empty.

Has anyone had this happen? Any suggestions of where to look first to repair/ replace before I hand it off to the mechanic at annual?

Thanks,
chris

[N3322G]

My experience has been grounding or adjustment. Air Parts of Lock Haven does overhaul them.
IIRC the service manual has a section on this.