As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LO HYD FLOW RT) ANNUNCIATOR ILLUMINATED ON TAKEOFF ROLL AT 40 KNOTS. NO SECONDARY INDICATIONS. ABORTED TAKEOFF. REMOVED AND REPLACED R/H LO HYD. FLOW CHECK VALVE WITH A NEW UNIT. PERFORMED OPS TEST. CHECKED SATISFACTORY NO LEAKS NOTED. I.AW. CE-560XL M.M. CHAPTER 29-11-04.