What was found
AFTER DEPARTING KLCK WITH NORMAL PROCEDURES, WE NOTICED THE FLOW LIGHT ILLUMINATED. STOP CLIMB AT 230 & RAN QRH, UNABLE TO MAINTAIN CABIN PRESS & RETURNED TO KLCK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AFTER DEPARTING KLCK WITH NORMAL PROCEDURES, WE NOTICED THE FLOW LIGHT ILLUMINATED. STOP CLIMB AT 230 & RAN QRH, UNABLE TO MAINTAIN CABIN PRESS & RETURNED TO KLCK.