Mountains

The pilot, sole on board, departed Siegerland Airport at 1100LT on a ferry flight to Monte Argentario, Tuscany. En route, while overflying Switzerland, he encountered marginal weather conditions. While cruising in IMC conditions, the single engine airplane impacted the slope of a rocky and snow covered face located west of Mt Grüehorn, in the south part of the canton of saint Gallen. The wreckage was found at an altitude of 1,700 metres. The aircraft disintegrated on impact and the pilot was killed.

The airplane departed Kunming-Wujiaba Airport at 1315LT on a schedule service (flight MU5735) to Guangzhou, carrying 123 passengers and a crew of nine. At 1420LT, while cruising at an altitude of 29,100 feet, the aircraft entered an uncontrolled descent until 7,400 feet then climbed to 8,600 feet. It finally entered a steep descent and crashed almost two minutes later in a vertical attitude on hilly and wooded terrain located southwest of Wuzhou. The aircraft disintegrated on impact and all 132 occupants were killed. Two days after the accident, the CVR was found while the DFDR was found on March 27.

The pilot, sole on board, departed Cody, Wyoming, on a private flight to Steamboat Springs. While approaching Steamboat Springs-Bob Adams Airport by night, the pilote encountered limited visibility due to low clouds. On final, the airplane impacted trees and crashed in a wooded area located on the slope of Mt Emerald, about 6 km south of airport runway 32. The aircraft was destroyed and the pilot was killed.

The aircraft was completing an aerial work mission (calibration), carrying six crew members. En route, the aircraft impacted trees and crashed in a wooded area located on the slope of Mt Khrebtovaya located in the Bolchoï Khekhtsir Mountain Range. The wreckage was found a day later at an altitude of 786 metres and some 38-40 km southwest from the Khabarovsk-Novy Airport. The aircraft was totally destroyed by impact forces and all six occupants were killed. At the time of the accident, the visibility was reduced to 2 km due to low clouds.

On 15 September 2021, a DHC-6-300 (Twin Otter) aircraft registered PK-OTW was being operated for an unscheduled cargo flight from Douw Aturure Airport (WABI), Nabire, Papua to Bilorai Airport (WAYB), Intan Jaya, Papua. The aircraft was operated by two pilots accompanied by one engineer on board. The filed flight plan for the flight indicated that the aircraft would be operated under Visual Flight Rule (VFR) with fuel endurance of 2 hours 30 minutes. The estimate time departure for the flight was at 0640 LT. At 0610 LT, the pilot received weather observation report from the Bilorai aeronautical communication officer (ACO) that the visibility was 5 up to 7 kilometers, several clouds over the airport and all final areas were clear. About 7 minutes later, the ACO updated the observation report which indicated that the visibility changed to 7 up to 8 kilometers (km). After the cargo loading process and the flight preparation had completed, the aircraft taxied to Runway 16. At 0644 LT, the aircraft departed and climbed to the cruising altitude of 9,500 feet. Prior to the departure, there was no record or report of aircraft system malfunction. The Pilot in Command (PIC) acted as Pilot Monitoring (PM) while the Second in Command (SIC) acted as Pilot Flying (PF). At 0658 LT, the PK-OTW pilot reported to the Nabire air traffic control that the aircraft was at 25 Nm with altitude of 9,500 feet. At 0702 LT, the SIC asked the PIC to have the aircraft control as PF. During flight, the PK-OTW pilots monitored weather information provided by the pilots of two other aircraft that flew ahead of the PK-OTW to Bilorai. Both pilots monitored that the first aircraft (Cessna 208B EX) landed using Runway 27 while the second aircraft (Cessna 208B) would use Runway 09. At 0715 LT, the PIC advised the SIC to use the Runway 27 for landing. At 0719 LT, the SIC made initial contact with the ACO and advised that the aircraft was approaching Bilai at altitude of 9,500 feet and the estimate time arrival at Bilorai was 0726 LT. The ACO acknowledged the pilot report and provided current weather observation as follows “…wind westerly 3 until 5 knots, final 09 open with broken fog and final 27 open, visibility 5 until 7 km, blue sky overhead”. The SIC acknowledged the weather information and advised the ACO would report when the aircraft position was on left downwind Runway 27. At 0721 LT, the SIC read the descent checklist included the item of Landing Data/Approach Briefing and was replied by completed. The Cockpit Voice Recorder (CVR) did not record any pilot’s discussion regarding to the airport minimum safe altitude since the beginning of the recording. At 0723 LT, a pilot of DHC-6-400 aircraft registered PK-OTJ, asked the PK-OTW pilot of the weather condition in Bilorai. The PK-OTJ flew behind the PK-OTW with from Nabire to Bilorai. The SIC then responded that the PK-OTW was on descend and would fly through clouds about 5 Nm to Bilorai. Thereafter, the ACO provided traffic information to PK-OTW pilot that there was an aircraft (Cessna 208B aircraft) on final Runway 09. The PIC who acted as PF acknowledged the traffic information and advised to the ACO that the PK-OTW would join left downwind Runway 27 for the landing approach. At 0725 LT, the SIC advised to the ACO that the aircraft was on left downwind Runway 27. The ACO then advised the PK-OTW pilot to report when on final Runway 27. At 07:26:12 LT, a stall warning recorded in the Cockpit Voice Recorder (CVR) then the PIC asked to the SIC to check the aircraft speed. The SIC responded the aircraft speed was 65 knots. At 07:26:16 LT, the PIC asked to the SIC to advise the ACO that they were making a go around. The SIC then advised the ACO that the PK-OTW was making a go around and was responded to report when on final. The CVR did not record pilot’s discussion about the plan maneuver of the go around. At 07:26:45 LT, the PIC informed that they were making a go around to the PK-OTJ pilot. The PK-OTJ pilot responded that the aircraft was approaching Homeyo and would reduce the speed to make enough separation with the PK-OTW. The PIC then advised the PK-OTJ that the PK-OTW would attempt to land using Runway 09. Based on the data transmitted from the flight following system, at 07:27:57 LT, the aircraft was about 3 Nm outbound from Bilorai on direction of 238°. At 07:28:22 LT, the PK-OTJ pilot advised to the ACO that the aircraft was about 6 nm to Bilai and the pilot intended to make holding maneuver over Bilai to make enough separation with the PK-OTW. At 07:28:33 LT, the SIC advised the PIC that the aircraft was at 8,200 feet and was responded that the PIC initiated turning the aircraft. A few second later, the SIC advised to the PIC that the aircraft was turning, and the aircraft was at 3.2 Nm outbound from Bilorai. At 07:28:38 LT, the last data of the flight following system recorded that the aircraft was on direction of 110°. At 07:29:25 LT, the SIC advised the PIC to fly left. Thereafter, the SIC advised the PIC that the aircraft was passing 8,000 feet. At 07:29:35 LTC, the PIC asked to the SIC about the distance to Bilorai and was responded 2.5 Nm. The SIC, reminded the PIC to fly left as the aircraft flew too close to the terrain. At 07:29:49 LT, the CVR recorded the first impact sound and the CVR recording stopped at 07:29:55 LT. At 0730 LT, the ACO asked the PK-OTW pilot intention as the aircraft was not visible from the ACO working position, and the pilot did not respond the ACO. At about the same time, the ACO heard impact sound that was predicted coming from terrain area on west of Bilorai. The ACO then called the PK-OTW pilot several times without response. Several pilots also attempted to contact the PK-OTW with the same result. The PK-OTW was found on a ridge at elevation of 8,100 feet, about 2 Nm on bearing 260° from Bilorai.

Owned and operated by the Russian Navy, the aircraft was dispatched in Turkey in July to help the Turkish government (General Directorate of Forestry) to fight raging forest fires in the southeast part of the country. On board were eight crew members, five Russian and three Turkish. After the aircraft drop water on fire, the crew elected to gain height when the aircraft impacted terrain and crashed on the slope of a mountain, bursting into flames. The aircraft was totally destroyed and all 8 occupants were killed.

On August 5, 2021, about 1050 Alaska daylight time, a DeHavilland DHC-2, N1249K, was destroyed when it was involved in an accident near Ketchikan, Alaska. The airline transport pilot and five passengers were fatally injured. The airplane was operated by Southeast Aviation, LLC, as a Title 14 Code of Federal Regulations Part 135 on-demand sightseeing flight. On the morning of the accident, an airplane fueler noted that the pilot performed a preflight inspection of the airplane and then asked the fueler to fuel the airplane so that the front tank was full (35 gallons) and the center tank was filled to 20 gallons of fuel. The pilot departed on the first passenger flight of the day about 0752 and returned to the dock about 0921. He again asked the fueler to fill and top off the front tank and fill the center tank to 20 gallons (totaling 55 gallons of fuel). Then, the pilot departed on the second passenger flight of the day, the accident flight, about 0939. The airplane was equipped with a Spidertracks flight tracking system, which provides realtime aircraft flight tracking data. The flight tracking information is transmitted via Iridium satellites to an internet-based storage location, at one-minute intervals. The first part of the flight the airplane flew through the Misty Fjord Monument and landed on Big Goat Lake about 1018. Then at 1027, the airplane departed the lake and was en route to return to Ketchikan Harbor. The last satellite tracking system transmission from the airplane was at 1048; when the airplane was at an altitude of 1,730 ft mean sea level (msl) and on a ground track of 261° true. About 1050, the United States Coast Guard (USCG) Alaska received a 406 Mhz emergency locator transmitter (ELT) signal assigned to the accident airplane. After being notified of an overdue airplane and after learning about reports of an ELT signal along the accident pilot’s anticipated flight route, search and rescue personnel from the U.S. Coast Guard Air Station Sitka and Temsco Helicopters, Inc. began searching for the missing airplane. The airplane was located about 1120 and USCG rescue personnel reached the accident site later that afternoon and confirmed that there were no survivors. The airplane impacted heavily wooded, mountainous terrain about 18 miles northeast of Ketchikan, Alaska, and 1.46 miles from the last satellite tracking system point at an elevation of about 1,750 ft msl. The airplane initially impacted a tree about 435 ft from the main wreckage location, and the outboard section of the left wing was located at the base of the tree. The inboard section of the left wing was located in a tree along the debris path, which had a heading of 242°. All major components of the airplane were located in the vicinity of the main wreckage. The fuselage came to rest on the left side and was impact crushed. The right wing remained attached to the fuselage. The outboard section of the right wing was impact separated but remained attached through a cable. The empennage remained attached to the fuselage and was impact damaged. The rudder and vertical stabilizer remained attached to the empennage, but the vertical stabilizer tip was separated. The left horizontal stabilizer and elevator were impact separated. The right horizontal stabilizer remained attached to the empennage and exhibited leading edge damage. The right elevator was impact separated. The floats were impact separated. The forward section of the left float was impact damaged. Flight control continuity was confirmed from the flight controls in the cockpit to all flight control surfaces. The airplane was equipped with a Pratt & Whitney R-985 series engine. The engine remained attached to the airframe though several of the engine mounts were separated and the engine exhibited damage signatures consistent with impact damage. The oil sump was impact damaged and had a hole in it. Fuel was noted in the line from the firewall to the engine. A detailed engine examination is pending. The airplane was equipped with a 3-blade, controllable pitch propeller. All blades remained attached to the hub. The spinner was removed and exhibited impact damage. The propeller blades exhibited bending and chordwise scratching in several locations. Other pilots who were flying passenger flights on the morning of the accident stated that there were low clouds in the valley in which the accident occurred. Pilots who were assisting with the search and rescue efforts reported that the weather was overcast and the mountain tops were obscured. In addition, the clouds were as low as 600-800 ft overcast above ground level
in some of the valleys, including the valley of the accident location.

On July 10, 2021, about 1255 mountain standard time, a Beech C-90, turbo prop airplane, N3688P, was destroyed when it was involved in an accident near Wikieup, Arizona. The pilot and Air Tactical Group supervisor were fatally injured. The airplane was operated as a public-use firefighting aircraft in support of the Bureau of Land Management conducting aerial reconnaissance and supervision. The airplane was on station for about 45 minutes over the area of the Cedar Basin fire. Preliminary radar data showed that the airplane had accomplished multiple orbits over the area of the fire about 2,500 ft above ground level (agl). The last radar data point showed the airplane’s airspeed about 151 knots, its altitude about 2,300 ft agl, and that it was in a descent, about 805 ft east southeast of the accident site. According to a witness, the airplane was observed in a steep dive towards the ground. Subsequently, the airplane impacted side of a ridgeline in mountainous desert terrain about 15 miles northeast of Wikieup. The wreckage was consumed by a post-crash fire. Debris was scattered over an area of several acres. The left wing was located about 0.79 miles northeast of the main wreckage and did not sustain thermal damage. No distress call from the airplane was overheard on the radio.

The twin engine aircraft departed Villavicencio-La Vanguardia Airport in the early morning on a local training mission. In unknown circumstances, the aircraft impacted trees and crashed in a wooded and hilly terrain located in the region of Restrepo. All three crew members were killed.

On April 23, 2021, about 1701 central daylight time, a Piper PA-46-310P airplane, N461DK, was destroyed when it was involved in an accident near Danville, Arkansas. The pilot and three passengers sustained fatal injuries. The airplane was operated as a Title 14 Code of Federal Regulations (CFR) Part 91 personal flight. The airplane had departed the Muskogee-Davis Regional Airport (MKO), Muskogee, Oklahoma, about 1622 destined for Williston Municipal Airport (X60), Williston, Florida on an instrument flight rules flight plan. On the flight plan, the pilot indicated a planned cruise altitude of FL230. According to archived air traffic control (ATC) information, about 10 minutes after departure, ATC advised the accident pilot about moderate precipitation along the route of flight. About 1658, after reaching 20,200 ft, the airplane began to descend on a southeast heading. No further radio communications were received from the pilot. About 2 minutes after the descent began, the airplane initiated a right descending turn to the northeast and continued on that heading for about 30 seconds. The flight path then became erratic before the data ended. A search was immediately initiated, but due to the terrain, the airplane was not located until the next morning. The airplane was found in an area of densely forested terrain at an elevation of about 930 ft above mean sea level on a heading of about 010°. During the on-scene portion of the investigation, it was determined that the right wing, right aileron, right horizontal stabilizer, and right elevator had separated in flight and was not located within the vicinity of the main wreckage. Although an aerial search commenced, to date, these components have not been located. The airplane was equipped a Continental Motors TSIO-550 series engines. Detailed wreckage and engine examinations are pending.