Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew Inflight Shutdown; Flight Crew Landed in Emergency Condition; General Declared Emergency
Aircraft
About 35 minutes into the flight; we noticed #1 engine oil pressure fluctuating. With each fluctuation the pressure was getting lower. We discussed what we would do if this continued; and decided to divert if the pressure continued to drop. We reviewed the emergency checklist and picked out a diversion airport. The pressure went into the yellow and we completed that checklist; briefed the passenger; and diverted. As the pilot flying; I flew the airplane and monitored radios while my co-pilot completed the checklists. The pressure then dropped into the red; giving us a master warning and low pressure annunciator. We secured the engine per the checklist and continued our descent to our diversion airfield. We declared an emergency and did a visual approach with no further incidents. Note: this engine had just been worked on for an oil leak; and was signed off prior to our flight.
[No substantive additional information was included in the secondary narrative.]
A CE-560XLS flight crew shut down the left engine when the oil pressure fell into the red and diverted to the nearest suitable airport.