What is a notable disadvantage of Skydrol hydraulic fluid?

Skydrol hydraulic fluid is known for its performance in high-temperature and high-pressure environments, making it suitable for aviation applications. However, one notable disadvantage of Skydrol is its potential to break down insulation on certain types of electrical wiring. This reaction occurs due to the fluid's chemical composition, which can interact with some insulating materials, leading to degradation and increased risk of electrical faults or failures. Maintaining the integrity of wiring is crucial in aviation where reliability is paramount, hence this characteristic of Skydrol can pose significant safety concerns.

The other options, while they may reflect common concerns associated with hydraulic fluids in general, do not specifically apply to Skydrol in the same way. For instance, excessive wear on components is not typical for Skydrol as it is designed to lubricate effectively. A low boiling point can be problematic for other fluids, but Skydrol is engineered to perform at high temperatures. While it is true that Skydrol is not biodegradable, this characteristic is shared with various petroleum-based hydraulic fluids, but it does not directly relate to the operational hazards associated with its use, making the potential for insulation breakdown a more critical issue.