Mobil HyJet IV-A Plus is a fire-resistant Type IV phosphate ester aviation hydraulic fluid that offers performance capabilities at levels close to those of Type V fluids. It is the hydraulic fluid of choice for many of today's mixed-fleet airlines.

Features:

High temperature stability
Low density
Effective rust protection
Excellent low temperature flow properties
Excellent deposit control
Excellent protection against electro-chemical corrosion (erosion)
Approved by all major aircraft manufacturers
Fully compatible with all approved phosphate ester hydraulic fluids
Benefits:

Provides superior performance in a wide range of operating conditions
Helps to extend the life of hydraulic components
Reduces the risk of fire
Improves fuel efficiency
Saves money
Applications:

Mobil HyJet IV-A Plus is used in commercial aircraft hydraulic systems where phosphate hydraulic fluids are recommended. It is compatible in all proportions with commercial Type IV and Type V phosphate ester aviation hydraulic fluids.
Specifications:

Meets or exceeds the following industry and aircraft builder specifications:
SAE AS1241
Airbus Oil Specification D13
Boeing Specification MIL-PRF-81385C
De Havilland Canada Specification DHC-8/Q400 Oil Specification 200