B767-300 and 300 ER
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Flight Engineer; Flight Crew Flight Instructor
Flight Crew Last 90 Days 50; Flight Crew Total 12000; Flight Crew Type 350
Training / Qualification; Troubleshooting; Workload
Aircraft Equipment Problem Critical
Flight Crew Took Evasive Action; Flight Crew FLC complied w / Automation / Advisory; Flight Crew Landed in Emergency Condition; General Declared Emergency
Aircraft
Hydraulic Quantity Low Warning in C Hydraulic System. [We] turned off center pumps en route to conserve fluid as per Maintenance Control. Turned pumps back on to configure for approach and landing. Very low fluid indications; but all systems operated normally. Approach and landing [were] normal. Aircraft checked for fluid leaks or external damage by Fire and Rescue; given the all clear. Completed 'After Landing' checks and taxied to gate.
A B767 developed a Center Hydraulic System leak and; in order to conserve fluid; turned the pumps OFF at cruise but declared an emergency. They turned them back ON for a normal landing using the remaining fluid.