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GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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 Posted: Sun Apr 22, 2007 7:24 pm Post subject: Magnetos: a heads-up |
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I got a new 4371 magneto last week, 02/07 manufacture's date.
After I tightened the nut to about 30 inch-lbs (it's supposed to be 120
to 320 in-lbs) I was unable to move the impulse coupling body to trip
the impulse coupler. It was as though the entire impulse coupler was
locked up. I swapped out the impulse coupling body with the old one
and it still didn't work. I tried a different washer and nut, still
locked up. So, I started measuring the pilot shaft and associated
parts. The pilot shaft on the new mag was about .040 higher. When the
nut is snugged up, the washer locks the pilot shaft to the gear.
I called LyCon and asked if they'd seen it and was told they'd had a
few (4371s) recently that are not right.
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Gary
AuCountry Aviation
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flyv35b(at)minetfiber.com
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| Posted: Mon Apr 23, 2007 4:55 am Post subject: Magnetos: a heads-up |
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Very interesting! Didn't someone say that Unison had been bought out not
that long ago? I think it was in conjunction with problems with the LASAR
system. Is this a QC problem as a result?
Cliff
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GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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| Posted: Mon Apr 23, 2007 10:11 am Post subject: Magnetos: a heads-up |
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Yes, I hope we don't go through a learning period while GE learns how
to do something that's been done for 50 years.
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Gary
AuCountry Aviation
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