What was found
LEFT ISOLATION VLV STATUS MSG CAME ON AFTER TAKEOFF. ACCOMPLISHED QRH & AIR RETURN. PLACED NR 1 THRUST REVERSER ON MEL, COMPLIED WITH DDP. AC OK TO CONTINUE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LEFT ISOLATION VLV STATUS MSG CAME ON AFTER TAKEOFF. ACCOMPLISHED QRH & AIR RETURN. PLACED NR 1 THRUST REVERSER ON MEL, COMPLIED WITH DDP. AC OK TO CONTINUE.