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.