As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN PREPARING TO INSTALL BREAKER ON AN AIRCRAFT, ATTEMPTED TO REMOVE THE TERMINAL'S SCREWS ON BACK OF BREAKERS. ALL 4 BREAKER HOUSINGS CRACKED DUE TO THE SCREWS BEING TOO TIGHT FROM THE FACTORY. BEFORE REMOVING SCREWS, PLACE TERMINAL IN A VISE TO HOLD TERMINAL FROM TWISTING.