What was found
AIRCRAFT WAS GROUNDED: GREEN HYDRAULIC RESERVOIR LOW LEVEL, GREEN ENGINE 1 PUMP LOW PRESSURE, GREEN SYSTEM LOW PRESSURE, YELLOW HYDRAULIC PUMP OVERHEAT WHEN GREEN SYSTEM FAILED. AN EMERGENCY WAS DECLARED, AND THE AIRCRAFT RETURNED TO PHX. THE CREW PERFORMED A MANUAL GEAR EXTENSION AND THE AIRCRAFT LANDED SAFELY AT PHX WHERE IT WAS TOWED TO THE GATE. **SUPPLEMENTAL REPORT WILL BE SUBMITTED** (OPEN)