As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF WHEN SWAPPING BLEEDS TO ENGINE BLEEDS, LT PACK SHUTOFF, NOT ASSOCIATED WITH ANY MESSAGES. TRIED TO CYCLE AND WOULD NOT TURN BACK ON, DURING FINAL APPROACH WITH THRUST LEVERS IDLE, RECEIVED RT PACK HIGH PRESSURE. R & R LEFT 10TH STAGE SHUTOFF VALVE IAW AMM. NO LEAKS NOTED. OPS CHECKED GOOD.