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Certified Aircraft Rewiring

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mcdevitt(at)sympatico.ca
Guest

Posted: Sat Feb 04, 2006 2:35 pm Post subject: Certified Aircraft Rewiring

I am in the middle of an engine overhaul and I thought this might be a good 

time to do some rewireing.

My question is: The lead from the alternator goes into the cabin to a 50 amp 

circuit breaker

The battery lead goes to the ammeter shunt and then into the bus. I'm 

thinking I should eliminate the 50 amp circuit breaker and connect the 

alternator to the battery at the ammeter shunt.

This is a certified aircraft, Aeronca Sedan, 1948 vintage and the wiring 

bears no relationship to the factory drawings because the engine has been 

changed to a 0-360 and the gererator replaced with an alternator.

Am I still legal if I do this, and is it worth while? At present I get a 

small amount of noise/interference, certainly liveable.

Thanks for your help.



Bob

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khorton01(at)rogers.com
Guest

Posted: Sat Feb 04, 2006 3:21 pm Post subject: Certified Aircraft Rewiring

On 4 Feb 2006, at 17:15, Bob McDevitt wrote:



 	  Quote: 	
		   

 <mcdevitt(at)sympatico.ca>



 I am in the middle of an engine overhaul and I thought this might  

 be a good

 time to do some rewireing.

 My question is: The lead from the alternator goes into the cabin to  

 a 50 amp

 circuit breaker

 The battery lead goes to the ammeter shunt and then into the bus. I'm

 thinking I should eliminate the 50 amp circuit breaker and connect the

 alternator to the battery at the ammeter shunt.

 This is a certified aircraft, Aeronca Sedan, 1948 vintage and the  

 wiring

 bears no relationship to the factory drawings because the engine  

 has been

 changed to a 0-360 and the gererator replaced with an alternator.

 Am I still legal if I do this, and is it worth while? At present I  

 get a

 small amount of noise/interference, certainly liveable.

 Thanks for your help.


	


Bob,



I assume by your e-mail address that you live in Canada, and that  

this is a Canadian registered aircraft.  I also assume that you have  

not put it into the Owner Maintenance category.



Removing the circuit protection for the alternator lead is a  

significant design change.  This design change would need to be  

approved via an STC, in my opinion.  If you were intending to keep  

the 50 amp CB, and simply change the wire routing, perhaps an AME  

would be prepared to sign off on it as a repair, completed in  

accordance with "specified data".  Specified data, as defined in the  

Airworthiness Manual 571.06 includes FAA AC 43.13-1.



http://www.tc.gc.ca/civilaviation/RegServ/Affairs/cars/Part5/ 

Standards/571s.htm#571_06



If this is a US registered aircraft, you possibly could do it under a  

337 Field Approval, but there is no similar process in Canada.



Kevin Horton         RV-8 (finishing kit)

Ottawa, Canada

http://www.kilohotel.com/rv8

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BobsV35B(at)aol.com
Guest

Posted: Sat Feb 04, 2006 3:48 pm Post subject: Certified Aircraft Rewiring

Good Afternoon Bob,  



The type certificate for the 15AC is now held by some folks up in  Alaska.  

The engine you have is not mentioned in the TCDS.  Therefore,  there must be an 

STC that was used for the installation.  That STC, or  another one for the 

alternator installation, should include data as to how  your airplane should be 

wired. If the change you want to make differs from the  way it was done for 

the STC involved, you might check with whoever has been  doing the annual on 

your airplane.  It is possible that the change could be  considered a minor 

alteration. If that is the case, the change could be made and  a log book entry 

made by a properly certificated mechanic.  If your IA  agrees that the change is 

minor, you are home free. If your IA does not agree  that the change is minor, 

you could shop for another IA or consider applying for  a local approval for 

your change.

 

Any help at all?

 

Happy  Skies,



Old Bob

AKA

Bob Siegfried

Ancient Aviator

Stearman  N3977A

Brookeridge Air Park LL22

Downers Grove, IL 60516

630  985-8503



 

In a message dated 2/4/2006 4:36:32 P.M. Central Standard Time,  

mcdevitt(at)sympatico.ca writes:



This is  a certified aircraft, Aeronca Sedan, 1948 vintage and the wiring 

bears no  relationship to the factory drawings because the engine has been 

changed  to a 0-360 and the generator replaced with an alternator.

Am I still legal  if I do this, and is it worth while? At present I get a 

small amount of  noise/interference, certainly liveable.

Thanks for your  help.

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