What information must be included in an instrument malfunction report?

The degree to which IFR flight is impaired is critical in an instrument malfunction report because it provides essential information to air traffic control and other relevant authorities about how the malfunction affects the aircraft's ability to operate safely in Instrument Flight Rules conditions. This information helps ascertain whether the situation poses an immediate risk to the flight and informs necessary responses, including potential rerouting, emergency assistance, or changes in flight status.

Understanding the severity of impairment allows for more effective risk management and decision-making by both the pilot and air traffic control. For example, if a malfunction limits the pilot's ability to navigate or maintain altitude, knowing the degree of this impairment helps prioritize actions to minimize risk to the flight and others in the airspace.

While other aspects like the aircraft registration number, the pilot's identity, and the type of malfunction may be relevant for record-keeping and analysis, the specific impact on IFR operations is paramount in ensuring safety and effective communication during pilot-controller interactions.