Complete Lane B Failure

Everyone,

After completing an inspection of all the connectors and wiring harness from the engine to the EMS, I found the second round twist plug at the fuse box to be coming off.  It was just hanging on to the fuse box not locked in place with the turn locking mechanism.   Completed an engine run-up and the warning or fault did not come up again.  I will take it up for a flight once the temperature cool off here in SoCal.

Thanks,

Emmanuel

Emmanuel,

The coupling ring on that connector is easily damaged if any tool is used to turn it.  When locking the ring it should turn easily by hand and reach a positive stop where a locking detent can be felt. I’ve seen where one of the two cam tabs on the inside of the coupling ring have broken off, so the ring does not lock properly.  If that happens, the coupling ring can be easily replaced without replacing the connector body.  I believe this is the same part as on the 912iS, which is a TE Connectivity/AMP, part number 213810-1.  Replacement is easy, just cut off the old ring with diagonal cutting pliers, then push the new ring on until it snaps in the retaining groove. 

Thanks for the reply.  

The coupling rings were inspected and the two tabs are not damaged.  

I am still going to get a replacement and keep on inspecting the connectors during Pre-flight.

Thanks,

Emmanuel