Date: 201310
Local time of day: 0001-0600
Location: ZZZ.TRACON, US
Flight conditions: VMC
Light: Daylight
Aircraft: Cessna Citation Sovereign (C680)
Operator: Corporate
Operating under: Part 91
Mission: Passenger
Flight phase: Climb
ATC / advisory: TRACON ZZZ
Aircraft component: Hydraulic Main System
Component problem: Failed
Reporter organization: Fractional
Reporter function: Captain; Pilot Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Second reporter function: First Officer; Pilot Not Flying
Anomaly: Aircraft Equipment Problem Critical
Detector: Automation Aircraft Other Automation; Person Flight Crew
When detected: In-flight
Result: Flight Crew Diverted; Flight Crew Landed in Emergency Condition; General Declared Emergency; General Maintenance Action
Contributing factors: Aircraft
Primary problem: Aircraft

Narrative: On departure just after takeoff we received a Hydraulic Pressure Low CASS message. We lowered the landing gear anticipating a Hydraulic Low Level light. The Hydraulic Volume Low light came on just after the gear was lowered. We completed the check list and contacted ATC for an alternate airport due to the short length of the departure runway (5;000 FT). Departure informed us that Tower could see something 'streaming' from the aircraft after takeoff and recommended ZZZ which has 12;000 FT of runway. We declared an emergency and were vectored there. We then briefed a landing using emergency breaking. We were able to exit the runway and brought the aircraft to a stop. Upon inspecting the aircraft I could see that the Number 4 tire had 'locked' and blown. There was extensive hydraulic fluid all over the nose wheel compartment; leaking from the belly; and all the way down the belly of the aircraft. I then called the ACP on duty and informed him that we needed a recovery; where we had diverted to; and what had happened. I then took photos and contacted Maintenance. (I forwarded the photos to Maintenance) The FBO was very near; so I had the aircraft towed to the ramp. (The other 3 tires appeared to me to be fine) Company arranged for the passenger to be taken by ground to a recovery aircraft. I completed the maintenance write ups on the tire and the hydraulic leak. I then called the ACP to insure there was no other action needed by him.


Second narrative: We boarded one (1) passenger for the FAR 91K flight. Nothing unusual noticed during taxi checks. Captain was flying this leg. We were cleared for takeoff and immediately after takeoff the Tower informed us we were loosing a great deal of fluid. Shortly after we received an amber 'Hydraulic Pressure Low' CAS message. We lowered the landing gear anticipating a 'Hydraulic Low Level light'. The amber 'Hydraulic Volume Low light' came on just after the gear was lowered. We completed the appropriate emergency checklists and contacted ATC for an alternate airport due to the short length; approximately 5;000 FT; of the departure airport. We decided the longer runway at ZZZ at approximately 12;000 FT; would be a better choice for an emergency landing. We declared an emergency and were vectored to ZZZ. After the plane was stabilized and enroute Captain informed the passenger of the situation. I contacted the FBO to have a tug ready to tow us to the ramp. There was no time to notify the company. We were cleared for a visual and backed it up with RNAV approach in the FMS. We then briefed the landing using emergency breaking. Landing was uneventful with no injuries. We were able to exit the runway on a high speed taxiway and brought the aircraft to a stop. After landing we completed the emergency checklist for 'Hydraulic Volume Low' and were towed to the FBO ramp. The right main outboard tire (Number 4) tire had locked up and was flat. All other tires appeared undamaged. We landed with approximately 50 cubic inches (27 oz.) of fluid left in system. There was extensive hydraulic fluid all over the nose wheel compartment and down the bottom center of aircraft. Captain called the ACP on duty and informed him of the emergency events and we needed a recovery aircraft. The passenger was taken into the FBO and transported on another aircraft to destination. Photos were taken and forwarded to Maintenance. All emergency procedures were adhered to and followed as prescribed. A more thorough examination of the aircraft by maintenance after two days of abnormal hydraulic events reported by the captain and being serviced in another Country (Territory).


Synopsis: CE680 flight crew experiences a main hydraulic system failure shortly after takeoff. The landing gear is quickly lowered before all pressure is lost and the flight diverts to a nearby airport. An outboard main gear tire locked up during roll out and deflated.