As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESSURIZING AS THROTTLES ARE ADVANCED FOR TAKEOFF. UNABLE TO DETERMINE CAUSE. CONTRACTED AN OUTSIE AGENCY FOR ASSISTANCE. AN OPERATIONAL CHECK OF THE CABIN PRESSURIZATION SYSTEM WAS COMPLIED WITH PER LEAR 60 MM 21-30-00. NO DEFECTS NOTED. AIRCRAFT WAS RETUREND TO SERVICE, AND RETURNED TO HOME BASE. (M)