As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OPERATOR REPORTED "HYDRA PUMP ON" MESSAGE WHEN RETRACTING LANDING GEAR AFTER TAKEOFF. IT WAS ALSO NOTED THAT THE CABIN PRESSURIZATION WAS NOT PRESSURIZING INTERMITTENTLY ON RECENT FLIGHTS. TROUBLESHOOTING WAS PERFORMED AND FOUND THAT THE LH SQUAT SWITCH HARNESS HAD AN OPEN WHERE IS WAS TIE-WRAPPED TO THE TRUNNION HOUSING. IT IS SUGGESTED THAT THE HARNESS BE CLAMPED USING ALTERNATE METHODS ( ADEL OR TIE-CORD) TO PREVENT DAMAGE TO UNDERLYING WIRING. REPLACED SQUAT SWITCH ASSEMBLY AND PROBLEM WAS RESOLVED.