-18 Mode Coupler Mount . 2 each Collins 345A-7 Rate of Turn Sensor 722-5140.001 2 each Collins S62A-SMS Stoering Computer 792-6703-002 2 each Collins 3908.18 Steering Computer Mount . .2 each Cotlrns S90A-3J-1 Altitude Control 622-439-001 2 each Collins 390R-19 Altitude Control Mount 2 each AAC 1S92046 Annunciator Coupler