A couple days ago, my 3DR Y6 suffered a failure mid-flight. I maintained altitude and some control for a few seconds, then, with the throttle at 100% is began losing altitude until it crashed pretty spectacularly into a tree and fell from about 20m.
Turns out one of the motors had died. I did a motors test with APM Planner and 5 motors turned but one did not. These are jDrones 880Kv.
I looked at the power system - PDB connection, ESC, connectors, wires into the motor, and everything looked fine. I looked closely at the motor with a flashlight, and noticed that there seemed to be a bit of a jumble of copper wire near the base of the motor, visible through the ovular openings in the black base.
I took the motor apart, and saw this:
The ring of wire bundles slid easily up from the base, which I don't think is supposed to happen, as this was not the case with a healthy motor I opened up. There appears to be some loose copper in there, and two copper wires appear cut - the ends stick out from some black rubber housing by a few mm, and go nowhere.
Can I fix this motor, or is it time to buy a new one? Seems a shame to throw it out if it's just some out-of-place copper.