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  #1  
Old 03-17-2020, 10:23 AM
jcboon jcboon is offline
 
Join Date: Aug 2013
Location: Amsterdam
Posts: 42
Default Lane A and B generator failure on 2nd flight

I did my first flight on February 6th. Before that I accumulated 1 hour on the engine in testing, working the brakes and swinging the compass.
After a few weeks of poor weather I planned a second flight three weeks ago. Immediately after starting the engine, both lane lights started blinking. And afterwards Skyviews error read-out showed "generator failure".

I bought a dongle and borrowed a simulator. Today, running the engine with the simulator the error was confirmed. Rotax is looking into it, and I am waiting for their input. But I thought in the mean time I might ask if anybody on the forum has any experience with this. Any suggestions in finding the origin of the error are much appreciated.

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Amsterdam
RV-12iS #121073
Flying Feb 6 2020

Last edited by jcboon : 04-19-2021 at 08:11 AM.
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  #2  
Old 03-17-2020, 01:22 PM
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Crafting N112DR Crafting N112DR is offline
 
Join Date: Oct 2013
Location: Powell, OH
Posts: 300
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Can't see any photos!
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N112DR (RV-12iS) (SOLD)
Airworthiness signed off by the FAA 1/23/2020
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Phase I Finished on 5/7/2020
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  #3  
Old 03-17-2020, 01:34 PM
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jrtens jrtens is offline
 
Join Date: Apr 2018
Location: Utah
Posts: 218
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Quote:
Originally Posted by rolick22 View Post
Can't see any photos!
I see them with the Chrome browser but not the Edge browser.
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2019 12iS SLSA
Salt Lake Int'l
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  #4  
Old 03-17-2020, 04:23 PM
deene deene is offline
 
Join Date: Jan 2005
Location: Georgetown, TX
Posts: 405
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See if you have any error lights in the Rotax engine fuse box. Look through the clear window on the fuse box cover which is on the left upper firewall under the cowl.
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N399AD RV-12...flying
N299AD RV8 QB, IO-390X, BA prop...SOLD
N199AD One Design...SOLD
N99AD BD4, flew for 22 years...SOLD
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  #5  
Old 03-18-2020, 12:26 AM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 3,165
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I have a ULS, so my comments should be taken with a grain of salt. Wouldn?t you have a negative battery load indication if the generator really went Tango Uniform (technical term&#128541?
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  #6  
Old 03-18-2020, 03:40 AM
jcboon jcboon is offline
 
Join Date: Aug 2013
Location: Amsterdam
Posts: 42
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Thanks for your suggestions. I understand little of the electrical design of the iS and I am very happy with any input.

Deene, all lights in the fuse box are in the green (with the engine not running).

Rich, you may be right that the generators went south. But if I understand correctly there are at least two of them. So I was hoping that this problem might be caused by a loose connection or cable. But I have no clue where to start looking.
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Amsterdam
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  #7  
Old 03-18-2020, 04:58 AM
jcboon jcboon is offline
 
Join Date: Aug 2013
Location: Amsterdam
Posts: 42
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I hope the pictures are visible now.
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Amsterdam
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Last edited by jcboon : 03-18-2020 at 07:34 AM.
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  #8  
Old 03-18-2020, 10:11 AM
benfra benfra is offline
 
Join Date: May 2007
Location: ft MYERS, FL Based @KPGD
Posts: 35
Default Lane a and b

My problems with the wiring connectors on my RV 12 ULS Rotax were numerous. The engine started with the MAGS ? OFF ! Luckly the AC was chocked, over crimped connectors cut the grounding wires, Other pins pulled out with very little pressure. I don't know who is to blame, electrical harness contractors or Rotax. May not be your prob but it was certinally was mine!!! Hope this helps other folks! GL Ben
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  #9  
Old 03-18-2020, 01:28 PM
jcl777 jcl777 is offline
 
Join Date: May 2016
Location: Kingwood, TX
Posts: 42
Default Red Lights on Both Lanes

I own an RV12-iS ELSA, bought with 17 hours on it last September (all Garmin gear). In November, at run up, one lane light was solid red, and one blinking. Appeared that second generator not active. I taxied back to the ramp, shut down, waited five minutes, and started her up. No issues. Have made about 18 flights since then without a problem.

During the lane check, I may have turned off Lane A, turned it back on, then failed to wait for the red light to extinguish before turning off Lane B. Maybe. Since then I've been careful to not do that. I have no idea if what I did had any impact.
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Kingwood, TX
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  #10  
Old 03-19-2020, 04:18 PM
deene deene is offline
 
Join Date: Jan 2005
Location: Georgetown, TX
Posts: 405
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We had a vexing failure on the 12is that was recently completed by the Tango program. The signature was an intermittent low voltage and battery discharge warning from a possibly failing generator B. In this case, a B generator failure does not cause a lane B fail light indication

After major debug effort with excellent support from Vans and Leading Edge Airfoils, I found an intermittent pin on one of the connectors on a cable from the Rotax fuse box to the HIC module behind the instrument panel. This caused intermittent operation of the B generator regulator.

Since this was a prefabricated cable supplied with the RV12iS kit, you should carefully examine the connectors on the cables to the HIC. In our case one pin would not stay seated which cause the intermittent failure.

We replaced the pin on the wire and carefully installed it in the connector shell and all was well...
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N399AD RV-12...flying
N299AD RV8 QB, IO-390X, BA prop...SOLD
N199AD One Design...SOLD
N99AD BD4, flew for 22 years...SOLD
EAA Tech Counselor/Flight Advisor
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