As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) APPROXIMATELY ONE FLIGHT HOUR ENROUTE THE (B) SYSTEM FLIGHT CONTROL MODULE LOW PRESSURE LIGHT ILLUMINATED. AIRCRAFT TURNED BACK. (B) SYSTEM FLIGHT CONTROL MODULE REPLACED DUE TO LOW PRESSURE SWITCH UNSERVICEABLE. TIMES- 37968:59 CYCLES: 23555 (TC NR 20060901002)