A friendly reminder to check finger screen filter

[base698]

Had fuel pressure dropping intermittently on a recent flight. After a call with Top Gun they suggested we have the mechanic check the finger screen and they immediately found a ball of lint.  

Super thanks to the Top Gun crew.

 

[Guest]

Often missed during Annual Inspections.

[mike_elliott]

Clarence, does your eagle eye detect the wrong O ring in the finger strainer?

[jetdriven]

I think they're supposed to be blue these days. How does that much left cause A fuel pressure interruption? Because even if the strainer is completely stacked full it will slide back against the spring and bypass it anyway

[PT20J]

17 minutes ago, jetdriven said:

I think they're supposed to be blue these days. How does that much left cause A fuel pressure interruption? Because even if the strainer is completely stacked full it will slide back against the spring and bypass it anyway

Good point. Maybe the stuff moves around? Don't know.

[Guest]

4 hours ago, mike_elliott said:

Clarence, does your eagle eye detect the wrong O ring in the finger strainer?

The finger screen O ring is still black in the ones we buy, the O ring on the inlet fitting is blue.

[MB65E]

On the RSA5 Fuel servo, installed on most 4 cylinder Injected Lycomings, the o-rings are:

Larger blue o-ring P/N 951789

Smaller black o-ring on the screen itself P/N 953541-10

The plug gasket to satisfy the the AD that's not stamped "G" yet is P/N 2577258.  I think this is the same P/N for the RSA10 fuel servo. But the O-rings are not the same.

The larger fuel servo installed on most 6 cylinder Lycoming's is the RSA10.  Its o-rings for the inlet screen are:

Larger P/N 951790, smaller P/N 951392.

Same installation practice.

The other “inlet screen” is just after the electric pump on the older airplanes. 

I purchase all of my servo orings and seals from RLB Accessory Services. 630-543-9213.  Ask for Butch or Bob.

Side note, Currently no one has the correct fluid to bench test fuel servos after overhaul. It became unobtanium last fall. 
 

-Matt