As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE AT 350, NOTED LT DUCT PRESSURE AT 3 PSI & RT AT 45 PSI. NO LIGHTS NOTED (WITH RECALL). BLEED AIR VALVES LT CIRCUIT BREAKER OUT. CIRCUIT BREAKER RESET. INCREASED AIRFLOW HEARD ON FLT DECK & LEFT PRESSURE RESTORED TO 45 PSI. TROUBLESHOT SYS BY STARTING AND RUNNING BOTH PACKS SEVERAL TIMES BUT CIRCUIT BREAKER DID NOT TRIP IAW AMM 20-60-01-860-801. THERE IS NO MX HISTORY WITHIN THE PAST 10 DAYS. GOOD FOR CONTINUED SERVICE.