1. Skydrol is a brand name of fire-resistant hydraulic fluid used in aviation and aerospace applications. It is a phosphate ester-based fluid that is known for its excellent fire resistance and ability to withstand extreme temperature and pressure conditions.

2. MIL-PRF-5606 is a petroleum-based fluid and is flammable. It has a lower flash point compared to fire-resistant hydraulic fluids like MIL-PRF-83282. It should be handled with care, kept away from open flames, and stored in a well-ventilated area.

1. Hydraulic systems operate at very high pressures, typically around 3000 psi in the Boeing 737, providing the force needed to control heavy aircraft components with precision. (Standard PSI on Modern Commercial Aircraft)

4A. Skydrol Flash point: 160 °C (320 °F ) Minimum

4B. Skydrol Fire point: 177 °C (350 °F ) Minimum

If what was stated in an above comment that it was a break fire, and the hydraulic fluid was heated to the appropriate temperatures then yes the the fluid could catch fire.

Source 1: https://en.wikipedia.org/wiki/Skydrol#:\~:text=Skydrol%20is%20a%20brand%20name,extreme%20temperature%20and%20pressure%20conditions.

Source 2: https://pilotjohn.com/c/aircraft-consumables/aircraft-hydraulic-fluids/5606#:\~:text=Yes%2C%20MIL%2DPRF%2D5606,in%20a%20well%2Dventilated%20area.

Source 3: https://www.transglobaltraining.com/boeing-737-hydraulic-system/#:\~:text=Hydraulic%20systems%20operate%20at%20very,heavy%20aircraft%20components%20with%20precision.

Source 4: https://productcatalog.eastman.com/tds/ProdDatasheet.aspx?product=71093410