52-01-01 CKPT DOOR CONT Normal Overhead Panel

52-01-01-01 CHAN (1, 2) LEDs on the CKPT DOOR CONT Overhead Panel
52-01-01-02 STRIKE (TOP, MID, BOT) LEDs on the CKPT DOOR CONT Overhead Panel
52-01-01-03 Pressure Rate Sensor on the CKPT DOOR CONT Overhead Panel