What was found
EDO-AIRE OR SIGMA-TEK DIRECTIONAL GYRO BACK PLATE -- FITTING PORTS CRACKING FROM MECHANIC OVERTIGHTENING FITTINGS. TORQUE SHOULD NOT BE MORE THAN 20 INCH/POUNDS, ALSO, SCREW HOLES CAN CRACK FROM INSTRUMENT REPAIRMAN TIGHTENING THESE 5 SCREWS TOO TIGHT. SOLUTION TO THIS WOULD BE TO PUT A WARNING STICKER ON THIS BACK PLATE SO IT CAN BE SEEN WHEN INSTALLING FITTINGS OR SCREWS IN PLATE. THIS PLATE IS MADE OF A PLASTIC MATERIAL. INSTALL NEW BACK PLATE.