What is the status of flying with one inoperable non-essential instrument?

Flying with one inoperable non-essential instrument is permissible under specific conditions. When a pilot deems an instrument non-essential, it indicates that its absence does not compromise the safety of the flight or prevent the safe operation of the aircraft. The pilot can make the decision to continue the flight while ensuring that the inoperative instrument is appropriately placarded. This means that the instrument should be clearly marked as inoperable, informing all crew members and any subsequent pilots of its status.

The flexibility to fly with inoperable non-essential instruments is generally subject to the regulations set forth by aviation authorities, which recognize that not all instruments are critical for flight safety. In this case, it highlights the importance of a pilot’s judgement and the requirement to communicate any issues to ensure safety and compliance.