B767-300 and 300 ER
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Troubleshooting
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
Aircraft Equipment Problem Dissipated; Flight Crew Overcame Equipment Problem; General Maintenance Action
Human Factors; Procedure
Upon arrival at the aircraft I was standing outside on the stairs and I notice jugs of what appeared to be a liquid falling out of the ULD [Unit Load Device] being unloaded from the aircraft. I descended the stairs to investigate what type of the liquid was in the container. The ZZZ Station Manager happened to notice me looking at something on the loader and approached. We both believed this to be a possible HAZMAT situation; not to mention loose cargo. There were several 1 gallon jugs that were outside the packaging box. The label was 5-40 Synthetic Heavy Duty Diesel Engine Oil. I believe I saw 5; 1 gallon jugs. The [load sheet for the] flight had no NOTOC [notice to crew].
B767-300ER Captain the inbound aircraft had indications of improperly configured Dangerous Goods along with documents suggesting undocumented transport of Hazmat cargo.