As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLEED AIR DUCT PRESSURE DIFFERENTAL LEFT 37 RIGHT 17 SINCE TAKEOFF CLIMB CRUISE AT FL 380. ACCOMPLISHED BLEED AIR SYSTEM HEALTH CHECK REF MM 36 11 00 700 801, FOUND BRAIDED FLEX LINE TO 450 THERMOSTAT LEAKING. REPLACED LINE. LEAK & OPS CHECK ACCOMPLISHED CHECKED GOOD. RAN ENGINES TO TAKEOFF POWER DUCT PRESSURES NORMAL REF MM 36 11 00 710 801.