What was found
LEFT DUCT PRESS FLUCTUATED PLUS/MINUS 15 PSI DURING CLIMBOUT. RETURNED TO JFK. REPLACED PRV CONTROLLER AND PRSOV VLV PER M/M. T/O PWR RUN PER PFHB, ALL NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LEFT DUCT PRESS FLUCTUATED PLUS/MINUS 15 PSI DURING CLIMBOUT. RETURNED TO JFK. REPLACED PRV CONTROLLER AND PRSOV VLV PER M/M. T/O PWR RUN PER PFHB, ALL NORMAL.