As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BIL - FLT 5011 - HYDRAULIC SYSTEM FAILURE DURING CRUISE FLIGHT FROM WOLF POINT TO BILLINGS. HYDRAULIC PUMP PRESSURE HOSE SEPARATED AT HOSE AND FITTING ON LEFT ENGINE. REMOVED AND REPLACED HOSE. ENGINE RUN AND LEAK CHECK COMPLETED WITH NO FURTHER DEFECTS NOTED. (X)