52-01-02 CKPT DOOR CONT BK UP Overhead Panel

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