1.   A frayed hydraulic line, combined with a computer malfunction, is thought to have caused an Osprey crash last December that killed four Marines.

2.   After takeoff, when they are retracted into the wheel well, which is crammed with hydraulic lines, the fluid could be in danger of igniting.

3.   After the plane landed without incident, problems were again found with the hydraulic line.

4.   In each instance, Alaska mechanics reported replacing the hydraulic line and servicing the hydraulic system, FAA records obtained by The Chronicle show.

5.   Investigators said the crash occurred after a hydraulic line was chafed by a nearby electric line, spilling hydraulic fluid.

6.   Neff nods out the window at an older tractor on which a hydraulic line gave way Tuesday afternoon.

7.   Pentagon officials in charge of testing the Osprey had warned of worn hydraulic lines in existing Osprey in the weeks before the crash.

8.   Some hydraulic lines associated with engine thrust reversers pass near the auxiliary power unit, and drains near the power unit get rid of any nearby leaks.

9.   The left engine broke away, which severed controls and hydraulic lines in the wing.

10.   Three days later, a Sea Knight carrying reporters and photographers off the USS Bonhomme Richard in California caught fire when a hydraulic line broke.