As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT RT DUCT PRESSURE READ 45 PSI, LT DUCT PRESSURE 22-23 PSI AS WE LEVELED AT OUR CRUSE ALT BOTH NEEDLES LEFT AND RIGHT READ 32-35 PSI WERE NORMAL. GROUND RAN ENGINE FOR 2 MIN AT 80 PERCENT N1 AND UNABLE TO VERIFY DISCREPANCY. FOUND LINE ON BLEED AIR REGULATOR AND FITTING ON PRECOOLER LOOSE TIGHTEND BOTH REF MM 36-11-00. VERIFICATION FLIGHT SUCCESSFUL.