KSU,
A Squared in 100% correct. I was going to reply to your post, but he covered it as thoroughly as it could possibly be covered. Even fractional operators, when operating under Part 91, cannot require a SIC for the purposes of logging time. Only if the aircraft requires a SIC by the type certification, or the FAA requires a SIC (safety pilot time is legitimate SIC time for the purposes of logging, as is time spent as SIC when required by OpSpecs), can the time be legally logged.
The fractional operator may require a SIC, but this doesn't make you a required crewmember in a single pilot aircraft. It doesn't entitle you to log the time as pilot, period. If the Fractional operator holds a 135 certificate with Operations Specifications which requires a SIC, you may log the time as SIC when properly authorized, only on flights conducted under FAR 135. Any flights conducted under FAR 91 in this case, as SIC, may not be logged as SIC. In cases where you are acting as SIC under the certificate and OpSpecs, you may only do so if current, with a current FAA 8410-3, and all your other currency requirements are met applicable to your position in the aircraft.
A Squared in 100% correct. I was going to reply to your post, but he covered it as thoroughly as it could possibly be covered. Even fractional operators, when operating under Part 91, cannot require a SIC for the purposes of logging time. Only if the aircraft requires a SIC by the type certification, or the FAA requires a SIC (safety pilot time is legitimate SIC time for the purposes of logging, as is time spent as SIC when required by OpSpecs), can the time be legally logged.
The fractional operator may require a SIC, but this doesn't make you a required crewmember in a single pilot aircraft. It doesn't entitle you to log the time as pilot, period. If the Fractional operator holds a 135 certificate with Operations Specifications which requires a SIC, you may log the time as SIC when properly authorized, only on flights conducted under FAR 135. Any flights conducted under FAR 91 in this case, as SIC, may not be logged as SIC. In cases where you are acting as SIC under the certificate and OpSpecs, you may only do so if current, with a current FAA 8410-3, and all your other currency requirements are met applicable to your position in the aircraft.