A Titan Airways Boeing 767-300, registration G-POWD performing charter flight ZT-1941 (callsign AWC-941) from London Stansted,EN (UK) to Rzeszow (Poland), was enroute at FL370 about 25nm southwest of Amsterdam (Netherlands) when the crew initiated an emergency descent to FL100 due to the loss of cabin pressure, the passenger oxygen masks deployed. The crew requested medical assistance available at the gate, emergency services received a major alert, a rescue helicopter was dispatched to the aerodrome, all other arriving flights were sent into holds. The aircraft landed safely on Amsterdam's runway 27 about 25 minutes after leaving FL370. There were no injuries, the alert level of emergency services was downgraded after the aircraft had landed. The remainder of the flight was cancelled, a number of passengers took other flights to Poland, a number returned to the UK. The occurrence aircraft is still on the ground in Amsterdam about 7 hours after landing. On May 15th 2017 the Dutch Onderzoeksraad (DSB) reported the crew received a cabin altitude warning which resulted in the automatic release of the passenger oxygen masks. The crew declared emergency, descended the aircraft and diverted to Amsterdam. The United Kingdom's AAIB is investigating the occurrence with the assistance by the DSB.