Beech 1900
Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Communication Breakdown
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Human Factors
While unloading Aircraft X a BE-1900C in ZZZ1; I discovered HAZMAT that had not been declared to the crew. The HAZMAT was a 'Battery; wet filled with acid' UN2794; class 8. The HAZMAT had the appropriate paperwork; but the pilot notification paperwork was not completed; nor was the crew notified. Appropriate company management personnel were notified and a SMS was completed.
Beech 1900 Captain reported undeclared Hazmat had been transported to destination. Flight crew notification procedures were not completed at departure airport.