What was found
GEAR WOULD NOT RETRACT AFTER TAKEOFF FROM MSP. RECEIVED SHOCK ABSORBER FAULT MESSAGE. COMPLIED WITH COM, BURNED DOWN FUEL, AND LANDED UNEVENTFULLY AT MSP. CHECKED RIGHT MLG STRUT PRESSURE AND FOUND 1250 PSI WITH 3-3/32 INCHES OF EXTENSION. JACKED AIRCRAFT AND STRUT WOULD NOT EXTEND. REMOVED RIGHT MLG STRUT, REPLACED SEALS, REASSEMBLED STRUT, AND SERVICED PER AMM. GEAR SWING CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.