Narrative:

While climbing in VFR through FL250 after takeoff, an oil temperature 20 degrees C higher than normal, was noted on the right engine with a lower than normal oil pressure. A return to the departure airport was made. While in the descent the oil pressure continued to drop so the engine was shut down and an uneventful landing was made in VFR conditions. No emergency was declared. As a crew member of a turbojet aircraft that operates under both parts 91 and 135, the crew questions if there was a need to declare an emergency with ATC though we required no special handling. We feel a clarification in the FARS over whether this condition warrants declaring an emergency and if the advantages of doing it would be useful.

Google
 

Original NASA ASRS Text

Title: CE550 HAS TO RETURN LAND DUE TO R ENG OIL TEMP HIGH AND OIL PRESSURE LOW.

Narrative: WHILE CLBING IN VFR THROUGH FL250 AFTER TKOF, AN OIL TEMP 20 DEGS C HIGHER THAN NORMAL, WAS NOTED ON THE R ENG WITH A LOWER THAN NORMAL OIL PRESSURE. A RETURN TO THE DEP ARPT WAS MADE. WHILE IN THE DSCNT THE OIL PRESSURE CONTINUED TO DROP SO THE ENG WAS SHUT DOWN AND AN UNEVENTFUL LNDG WAS MADE IN VFR CONDITIONS. NO EMER WAS DECLARED. AS A CREW MEMBER OF A TURBOJET ACFT THAT OPERATES UNDER BOTH PARTS 91 AND 135, THE CREW QUESTIONS IF THERE WAS A NEED TO DECLARE AN EMER WITH ATC THOUGH WE REQUIRED NO SPECIAL HANDLING. WE FEEL A CLARIFICATION IN THE FARS OVER WHETHER THIS CONDITION WARRANTS DECLARING AN EMER AND IF THE ADVANTAGES OF DOING IT WOULD BE USEFUL.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.