Precision Airmotive has issued a safety alert ...

David_Nelson · #1 03-07-2008, 07:36 AM

If any of you fly this with this system. From AOPA's web site:

... for its fuel-injection systems on many light aircraft?including all newer model piston-single Cessnas and some Pipers?because of a
possible loose brass regulator plug that could cause significant or complete engine power loss. Read more on AOPA Online [www.aopa.org].

/\/elson

Davepar · #2 03-07-2008, 09:34 AM

A more direct link:
http://www.precisionairmotive.com/Pu...A%20030308.pdf

rgbewley · #3 03-07-2008, 10:12 AM

A quick call to Precision Airmotive revealed that this issue also affects a number of Precision Silverhawk systems, which is more likely to affect members of this forum that have new experimental engines, either Superior or Lycoming.

Here is a link to Precision's website with the SB and serial numbers on affected units. www.precisionairmotive.com

Andy_RR · #4 03-13-2008, 03:09 AM

Oh dear - this safety alert has now turned into an emergency AD in the US and Australia. CASA has even barred all positioning flights for inspection which could cause some headaches!

from the FAA

and from CASA

kiwipete · #5 03-13-2008, 10:36 AM

I checked my Superior XP IO360 today and after only 20 hours the plug was indeed loose!!!!
Threads I think are ok however I think I'll send the unit back to the dealer to be sure

Peter

mahlon_r · #6 03-13-2008, 05:32 PM

http://rgl.faa.gov/Regulatory_and_Gu...1?OpenDocument

mburch · #7 03-13-2008, 08:15 PM

I'll be watching to see how this turns out. I have a servo built during the period in question (not flying yet). My brass hex plug is tight, but it sounds like the real problem is that the gasket shrinks after a certain number of flight hours and lets it loosen up. Hopefully the permanent fix will be as simple as a replacement gasket and a retorquing!

mcb

TGRV7 · #8 03-13-2008, 08:31 PM

Called Eagle Engines.
My new XP360 is in the AD.
They are going to help me with the solution.

rmcgann · #9 03-13-2008, 10:01 PM

I was just about to install my injection servo (new exp IO540 from Vans).

The plug on the servo (subject to this bulletin) was indeed loose and although lockwired could easily be jiggled with finger pressure. It certainly was not torqued to 90-100 in lbs per the SB. Apart from the test runs performed by Lycoming prior to delivery, my engine has not been run so the suggestion that the seal shrinks with heat is bull dust. It looks to me like the plug has not been torqued at the factory (at all!).

Ron
RV-10
FW fwd and finishing

kiwipete · #10 03-14-2008, 03:16 AM

I think after seeing mine loose after 20 hours and reading here that someone found it loose after just test runs. Even if you check and find it tight, I'd be inclined to re-torque the nut to 90-100 in lbs anyway. As it's a higher setting than set at the factory, just to be sure.

Peter