As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIS FITTING IS THE FORWARD, UPPER ATTACHMENT FITTING FOR THE T/R GEARBOX. THE CRACK RAN DOWN THE LEFT SIDE BETWEEN TWO RIVET HOLES INTO THE AFT RADIUS AND UP THE BACK SIDE OF THE FITTING. SUSPECT HAPPENED FROM NOT BEING DEBURRED OR T/R VIBRATIONS.