Air Canada Rouge Boeing 767-300 near Huatulco on Jan 29th 2018, EGPWS terrain warning

An Air Canada Rouge Boeing 767-300, registration C-GHLU performing flight RV-1893 from Calgary,AB (Canada) to Huatulco (Mexico) with 250 passengers and 9 crew, was in level flight at 16,000 feet about 33nm north of Huatulco in non-radar environment, when air traffic control cleared the flight to descend to 6000 feet MSL at pilot's discretion. About 30nm north of the aerodrome the crew initiated the descent, about a minute later at 11,800 feet MSL the crew received an EGPWS "Caution… (www.aeroinside.com) Altro...