De Havilland DHC-6 Twin Otter

The airplane departed Nome on a VFR flight to Shishmaref, about 122 miles to the north. Few minutes after takeoff, the crew encountered poor weather conditions with snow falls, limited visibility (night) and icing conditions. The airplane struck the slope of a mountain located to the north of Nome. As the airplane failed to arrive at destination, SAR operations were initiated but eventually suspended few days later as no trace of the aircraft nor the four occupants was found. The wreckage was localized on February 10, 1980. The aircraft was destroyed upon impact and all four occupants have been found dead.

On final approach to Tau Airport, the copilot failed to call out low airspeed. Following an improper level off, the airplane bounced on landing then veered off runway and collided with trees. All 18 occupants were rescued, among them one passenger was seriously injured.

On final approach to Big Trout Lake Airport, the crew encountered poor weather conditions and limited visibility. On final, the twin engine airplane struck an NDB tower and crashed. Both pilots and a passenger were killed while nine other occupants were injured. At the time of the accident, the visibility was below minimums.

Flight 106 was a schedule service from Vancouver to Powell River with an intermediate stop at Sechelt. The flight to Sechelt was uneventful. While approaching Porpoise Bay at Sechelt, at an altitude of 200 feet, the twin engine airplane rolled to the right in an angle of 90° then nosed down and crashed on the east shore of the bay, about 50 meters from the water. The captain and a passenger were killed while 14 other occupants were injured, four of them seriously.

The airplane was being used for a series of flights between Frobisher (YFB) and Brevoort Island, a distance of 119 nm. These flights were conducted under visual flight rules (VFR) with a Flight Notification filed at Frobisher. Two return flights were accomplished without incident and the aircraft was flown back to Brevoort for another round trip. On the final flight the aircraft, with the same two pilots and with seven passengers, left Brevoort at 21:57 hours local time enroute to Frobisher. The pilots contacted Frobisher Flight Service Station (FSS) at 22:31 reporting at 6000 feet altitude estimating Frobisher in 15 minutes. Upon receiving the latest weather indicating conditions below VFR limits, they requested clearance for "Special VFR". This clearance was granted. Another weather report was transmitted by the Frobisher FSS giving the 22:44 observation in which the ceiling had lowered to 400 ft with the visibility at 8 miles and the wind from 190 deg M at 22 knots. The pilot stated they would make a front course ILS approach to runway 36 with a landing on 18. At 22:58 they were issued a clearance for an ILS approach. They subsequently reported outbound at procedure turn altitude and at that time confirmed their planned approach for runway 36 with circling for 18. This was the last radio transmission from C-GROW. The Twin Otter was seen flying north along the runway. It then struck high ground about 1200 feet east of the runway and about 100 feet above runway level. The aircraft was destroyed and all nine occupants were killed.

Before loading the aircraft for takeoff from LaGuardia, the flight crew checked the enroute weather for the return flight to Hyannis and learned that a landing at the en route stop at New Bedford might not be possible. When they were advised of the weather situation, the passengers destined for New Bedford decided to remain in LaGuardia. At 2132, flight 248 departed LaGuardia for Hyannis on the last leg of the day. There were eight passengers and two flight crew members aboard. According to the first officer's and a passenger's testimony at the public hearing during the investigation of the accident, flight 248 was normal until the approach for landing at Hyannis. At 2234:08, flight 248 contacted Otis Approach Control and reported level at 5,000 feet. At 2239:05, the flight was given the current Hyannis weather which included an indefinite ceiling of 200 feet, sky obscured, visibility 3/4 mile in fog, wind 210° at 10 knots. It also included a visibility of 1 1/8 in light drizzle on runway 24. At 2244:36, flight 248 was 4 nmi north-northeast of the outer marker when Otis Approach Control gave the flight a vector of 210° to intercept the localizer at 1,700 feet for an ILS approach to runway 24 at the Barnstable Airport. At 2245:34, flight 248 was instructed to contact the Barnstable Airport tower. About 2247, the flight complied with this request and reported crossing the outer marker. The flight was cleared to land, however, no further transmissions were heard form the aircraft. The Boston Air Route Traffic Control Center (Boston Center) was able to track flight 248 to within 2.8 nmi of the intended touchdown point on runway 24. Boston Center's computer printout showed the flight's position at 2246:51 about 0.35 nmi northeast of the ILS outer marker at 1,700 feet. It also showed the flight about 0.15 nmi southwest of the outer marker at 1,500 feet at 2247:03. The last radar position shown for the flight was about 1.1 nmi southwest of the outer marker at 2247:27 at 1,100 feet. The first officer stated that the captain was flying the aircraft during the approach to Hyannis. He said that he made the following callouts: localizer alive, outer marker, 500 feet above, 200 feet above, 100 feet above, minimums, and 100 feet below. He said that the captain did not acknowledge any of these calls. The first officer said that when he called 'minimums', the aircraft was one dot below the ILS glidepath. The first officer said that it appeared that the aircraft was in a continual descent without any excessive sink rates or descent angles from 5,000 feet until impact, with the airspeed near 130 knots for the entire approach. He stated that, as he called '100 feet below', he looked outside the cockpit because he believed that the captain had the approach lights in sight. The first officer said that he did not see the ground before the aircraft crashed about 2248 into a heavily wooded area located 1.5 nmi from the approach end of runway 24, on the runway centerline extended. The accident occurred during the hours of darkness. The captain was killed while all other occupants were injured, some of them seriously.

About 2055LT, Downeast Airlines flight 46 crashed into a heavily wooded area about 1,2 mile south-southwest of the Knox County Regional Airport in Rockland, Maine. The crash occurred during a non-precision instrument approach to runway 03 in instrument meteorological conditions. Of the 16 passengers and 2 crew members aboard, only one passenger survived the accident. The aircraft was destroyed.

The airplane departed King Island-Currie Airport on a cargo flight to Wynyard-Burnie Airport, carrying one pilot and a load of meat. Weather conditions worsened and the pilot was unable to locate the destination airport so he decided to divert to Devonport Airfield. Unfortunately, the visibility was too low and he eventually decided to return to King Island. While approaching the coast, both engines failed due to fuel exhaustion. The pilot attempted an emergency landing when the airplane crashed in a prairie located in Yarra Creek, on the east coast of the island. The pilot was injured and the aircraft was destroyed.

The flight departed Steamboat Springs-Bob Adams Airport at 1855LT on a scheduled flight to Denver-Stapleton, carrying 20 passengers and a crew of two. After takeoff, while climbing, the crew encountered severe icing conditions and was cleared to return when the flight crashed into a mountain at the 10,530 feet level. Rescuers arrived on scene the following morning. A pilot and a passenger died while 20 other occupants were injured, most of them seriously. According to official observations, the weather at Steamboat Springs about 25 minutes before the accident consisted of an estimated 2,000 feet overcast ceiling and 6 miles visibility in freezing rain. According to surviving passengers, after the accident, snow was falling at the crash site and a strong wind was blowing and gusting from the west.

The twin engine airplane departed Pointe-à-Pitre on a schedule flight to the Island of Marie-Galante, carrying 19 passengers and one pilot. Weather conditions deteriorated en route and while approaching Marie-Galante, the ceiling was very low, about 200 feet above water with rain falls, turbulences and stormy conditions. While completing a slight turn to the left, the left wing tip struck the water surface. The aircraft crashed into the sea and sank by a depth of 13 meters few hundred meters offshore. Five passengers were rescued while 15 other occupants, among them the pilot, were killed. The wreckage was recovered. The aircraft was not equipped with a flight data recorder or an autopilot system.