Final answer:
The APU temperature shutting down at 732°C is the main indication of an over-temperature. Other indications include warning lights, visual inspections, and the presence of fire or smoke in severe cases.
Step-by-step explanation:
When the APU temperature passes through 732° C, it automatically shuts down. In addition to the automatic shutdown, there are other indications that alert you to an APU over-temperature. These indications can include:
- Warning lights on the instrument panel that illuminate to indicate an over-temperature condition
- Visual inspections of the APU exhaust for visible signs of an over-temperature such as discoloration or warping
- The presence of fire or smoke in severe cases
It is important to properly monitor and handle APU temperatures to prevent damage and ensure safe operation.