En otrevlig upptäckt vid 100 timmars tillsynen...
Bifogar mejlväxling med Vans:
I'm afraid we have no idea where the missing bits may have gone. These are inside the ring
of the air filter, so they may have been sucked into the carburetor -- although they would
probably cause enough damage that you'd know about it.
Forwarded by: "Support"
Forwarded to: kenS
Date forwarded: Mon, 15 Oct 2012 06:21:23 -0700
Date sent: Sun, 14 Oct 2012 21:32:25 +0200
From: "t.boyner@bredband.net"
To:
Subject: Door to filtered airbox
Hi,
Having flown my RV-9A more than 170 hours now I must say it´s a
wonderful airplane.
Today however when doing my annual inspection I
found something strange. When lowering the lower cowling and
inspecting the air filter box (FAB 360/540) I found the bypass
door,(VA-192B), with its air inlet,(VA-192A) loose, only attatched to
the fiberglass housing with the screw holding the control cable.
A small piece of the filter
housing where the platenut K1000-08 was riveted was missing and so
were the 5 poprivets AK42-H that used to attatch the air inlet to the
filter housing.
Should I be nervous about this?- I mean could they have been
sucked into the engine or did they most likely fall out of the air
filter housing, onto the lower cowling and out in the airstream?
I
have now reinforced the fiberglass housing and added a bracket on the
inside so that the VA-192A has something more solid to be riveted to.
Best regards
Thomas Boyner
Kit 91648
Detta gäller de som har "filtered air box" med en lucka i botten som kan öppnas med en wire från instrumentbrädan.
Jag har ingen förgasare utan direktinsprutning men lösa delar kan nog lika gärna sugas in i injektorhuset som in i en förgasare. Luftboxen är byggd enligt ritning men plasten är ganska tunn i originalutförandet så man kan tänka att vibrationer gör att popnitarna som håller infästningen till alternativa luftintaget gnager hål på plasten som i mitt fall.
Det märkliga är att popnitarna borde ha suttit fast i metallbrickan även om de lossnat från plasten men de är som sagt borta.
Jag har inte märkt något speciellt under flygning, så jag hoppas att popnitarna försvann " nedåt".
Thomas Boyner -XTB
Hem 
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