As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR RETURN BACK TO DEPARTURE. FLIGHT CREW REPORTED AIR ENGINE 2 BLEED ABNORMAL. AIR PACK 2 FAULT OCCURRED UPON THRUST REDUCTION AFTER TAKEOFF. F/O NOTICED SLIGHT ODOR ON TAKEOFF, FOUND SENSE LINES LEAKING, BOTH IP SENSOR AND THERMOSTAT R & R IAW AMM 36-21-49. PERFORMED FNC OF OVERPRESSURE VALVES IAW AMM 36-11-53. HIGH POWER ASSURANCE TEST PASSED IAW AMM 71-00-00. NO FAULTS NOTED.