Citation V/Ultra/Encore (C560)
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
General Maintenance Action; General Release Refused / Aircraft Not Accepted
Aircraft; Procedure
During preflight I noticed streaks of oil on the bottom of the engine cowling; right side. I was informed by a check airman several months earlier about an ongoing oil leak problem with the encore plus fleet. I contacted Maintenance who told me to run the engine 5 minutes and check the level. We ran the engine exactly 5 minutes and upon exit and visual inspection of engine we found a fresh puddle of oil under the engine. I photographed the puddle. Maintenance said to write it up and we went to the hotel. The next day; in the logbook the corrective action read 'observed crew running engine then shutdown. I didn't move the plane and there was no oil on the ground. I ran engines and noted no leaks.' After a call to the Chief Pilot; we re-ran the engine and no leaks were detected. After flying for 3 plus hours; we noticed oil leaking again and I called it in. Maintenance then discovered the fuel control unit seal and the hydraulic pump seal BOTH leaking oil. All of this is documented by pictures from my phone. The company gave me 3 choices of either writing it up now; continuing on or ferry to another location and write it up there. Option 3 seemed to be the worst one and should never be suggested. I decided to do the right thing and write the discrepancy there. When I say there is an oil leak at least open the cowling and look around and please; don't suggest that I am lying about it.
CE560 Captain reports discovering an oil leak during preflight inspection and making a logbook entry. Maintenance was unable to find a leak and signs off on the entry. Upon completion of the next leg the leak is apparent again and another log entry was made.