Hydraulic pressure?

A hydraulic pressure test.

Yankee One's losing hydraulic pressure.

Yankee One's losing hydraulic pressure.

Hydraulic pressure down in the rear stabilizer.

(d) A hydraulic pressure test and, if necessary, verification of the characteristics of the material by suitable tests.

Hydraulics okay. Fuel pressure's okay. All systems go.

Head-to-toe hydraulics and highly pressurized pneumatics.

Head-to-toe hydraulics and highly pressurized pneumatics.

NOTE : With the agreement of the inspection body, the hydraulic pressure test may be replaced by a test using a gas, where such an operation does not entail any danger.