Section 5 – Temperature Variation:

Temperature Change Rates

Category A – Equipment external to the aircraft or internal to the aircraft: 10 degrees Celsius minimum per minute.

Category B – Equipment in a non-temperature-controlled or partially temperature controlled internal section of the aircraft: 5 degrees Celsius minimum per minute.

Category C – Equipment in a temperature -controlled internal section of the aircraft: 2 degrees Celsius minimum per minute.

Category S1 – Equipment external to the aircraft or internal to the aircraft: Known rate of change greater than 10 degrees Celsius per minute.

Category S2 – Equipment external to the aircraft or internal to the aircraft: Unknown rate of change greater than 10 degrees Celsius per minute.