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japhillipsga(at)aol.com
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 Posted: Thu Oct 30, 2008 10:54 am Post subject: Found it at last-Coil feed wires not crimped on new alterna |
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Clive, great info and photos. Did this manifest itself in engine performance one way or the other or only in charging the battery ? What time frame did you buy the 3300? Thanks, Bill of Georgia
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Clive J
Joined: 03 Nov 2007
Posts: 340
Location: UK
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| Posted: Thu Oct 30, 2008 12:08 pm Post subject: Found it at last-Coil feed wires not crimped on new alterna |
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Hi Bill. only effect was battery volts dropping thought not conclusively. Charge light didn't come on for instance.
Plane was built in 2004. New coils (with dodgy crimps) were fitted in 2006 or 7.
Regards, Clive
From: owner-jabiruengine-list-server(at)matronics.com [mailto:owner-jabiruengine-list-server(at)matronics.com] On Behalf Of japhillipsga(at)aol.com
Sent: 30 October 2008 18:54
To: jabiruengine-list(at)matronics.com
Subject: Re: Found it at last-Coil feed wires not crimped on new alternator coil.
Clive, great info and photos. Did this manifest itself in engine performance one way or the other or only in charging the battery ? What time frame did you buy the 3300? Thanks, Bill of Georgia
-----Original Message-----
From: James, Clive R <clive.james(at)uk.bp.com>
To: jabiruengine-list(at)matronics.com
Sent: Thu, 30 Oct 2008 5:49 am
Subject: Found it at last-Coil feed wires not crimped on new alternator coil.
<<Crimps.JPG>> I've been chasing a charging problem on an aircraft in my hangar for a few years. J430 3300 Jabiru. Some time ago the agent changed the alternator coils for new ones whilst doing some elimination fault finding and the problem seemed to be cured for a year or so though it was never clear what the problem was.
However a few flights recently have shown some intermittent charging and on the last flight the radio packed up as the voltage was so low. The battery situation wasn't clear as it had been swapped many times for a spare so we started with charging the battery fully on the ground. Still no charge when running and as I began to start with measuring the AC from the coil I noticed some scorching in the AC lead connectors, see attached. Examining the scorched one it came off in my hand. I gentle pull on it's partner and this too also came off. The ends on the wires were stripped and 'tinned' but it is clear from examining the crimps they have never been either soldered or crimped to grip on the conductor.
Suggest you give your AC connections a good pull next time you have the cowlings off in case yours have the same problem which may manifest itself at an awkward moment. May also be worth sliding the insulation back and examining the crimp appearance or chopping them off and putting better ones on.
Regards, Clive
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