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Crash of a Beechcraft LR-2 Hayabusa near Assabu: 4 killed

Date & Time: May 15, 2017 at 1147 LT
Operator:
Registration:
23057
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
Sapporo – Hakodate
MSN:
FL-677
YOM:
2009
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
4
Circumstances:
The Beechcraft LR-2 Hayabusa (a version of the Beechcraft 350 Super King Air) departed Sapporo-Okadama Airport at 1123LT on a flight to Hakodate to evacuate a patient. On board were two doctors and two pilots. While descending to Hakodate at an altitude of 3,000 feet, the crew encountered poor weather conditions with low clouds and rain showers when the airplane registered 23057 (JG-3057) impacted the slope of a mountain located near Assabu, about 40 km northwest of Hakodate Airport. The aircraft disintegrated on impact and all four occupants were killed.

Crash of a Pilatus PC-12/45 in the Sea of Okhotsk

Date & Time: Jul 8, 2001 at 1345 LT
Type of aircraft:
Operator:
Registration:
N660NR
Flight Phase:
Survivors:
Yes
Schedule:
Hakodate - Magadan
MSN:
356
YOM:
2000
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
On July 8, 2001, approximately 1345 local time (0245UTC), a Pilatus PC-12/45, N660NR, registered to a US private owner, operated by Jeflyn Aviation, Inc. doing business as Access Air, and being flown by a US certificated airline transport rated pilot, was presumed destroyed following a ditching in the Sea of Okhotsk, Western Pacific Ocean. The pilot sustained minor injuries and the three remaining Japanese passengers were uninjured. Instrument meteorological conditions prevailed, and an IFR flight plan had been filed and activated. The flight, which was returning to the United States following a round-the-world trip, was being operated under 14CFR91 as a business trip. The aircraft had originated from Hakodate, Japan, departing 0910 hours local time and was destined for Magadan, Russia. The pilot reported in a telephonic interview that the aircraft was established in cruise at 8,100 meters altitude when he felt a vibration followed by a rapid increase in the engine's Turbine Temperature Indication (TTI). He reported that the TTI reached 1144 degrees during which there was a compressor stall. He shut the engine down, feathered the propeller, and initiated a power off emergency descent. During the emergency descent the pilot radioed a mayday on 121.5 MHz, set his transponder to code 7700, and manually activated the emergency locator beacon. The aircraft descended through multiple cloud layers during which the pilot and passengers prepared for the ditching. The pilot reported that upon breaking through the bottom of the last overcast layer, at 100 feet above the water, he encountered swells of approximately 8-12 feet height. He ditched the aircraft on the crest of a swell and the aircraft came to a stop floating in an upright, level attitude. All four occupants exited the aircraft through the main cabin door into a life raft. Over a period of several hours the occupants lost sight of the floating aircraft and after about 15 hours they were picked up by a Russian container ship and airlifted to Sakhalin Island.
Probable cause:
Engine failure for unknown reasons.

Crash of a NAMC YS-11A-213 in Sapporo

Date & Time: Feb 16, 2000 at 1243 LT
Type of aircraft:
Operator:
Registration:
JA8727
Survivors:
Yes
Schedule:
Hakodate - Sapporo
MSN:
2095
YOM:
1969
Flight number:
EL354
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
37
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
On approach to Sapporo-Okadama, the aircraft was too high on the glide and approached at an excessive speed. It landed too far down a snow covered runway and was unable to stop within the remaining distance. It overran, collided with snow bank and came to rest. All 41 occupants escaped uninjured while the aircraft was damaged beyond repair.
Probable cause:
Wrong approach configuration on part of the crew who completed the approach at an excessive speed and above the glide, causing the aircraft to land too far down the runway. The following findings were identified:
- The aircraft speed was 23 knots higher than the reference speed above threshold,
- Excessive speed upon touchdown,
- The braking action was reduced because the runway surface was contaminated with snow,
- The aircraft was unable to stop within the remaining distance,
- The crew failed to initiate a go-around procedure while the landing was obviously missed,
- Marginal weather conditions,
- Poor crew coordination,
- Poor airspeed monitoring on part of the flying crew.

Crash of a NAMC YS-11A-227 near Hakodate: 68 killed

Date & Time: Jul 3, 1971 at 1805 LT
Type of aircraft:
Operator:
Registration:
JA8764
Survivors:
No
Site:
Schedule:
Sapporo - Hakodate
MSN:
2134
YOM:
1970
Flight number:
JD063
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
64
Pax fatalities:
Other fatalities:
Total fatalities:
68
Circumstances:
While descending to Hakodate Airport, the crew encountered poor weather conditions. At an altitude of 6,000 feet, the airplane struck the slope of Mt Yokotsu located 18 km north of Hakodate Airport. The aircraft disintegrated on impact and all 68 occupants have been killed.
Probable cause:
The flight crew mistook a point approximately 5 nautical miles north of the Hakodate NDB as being just over the Hakodate NDB, a navigation aid, and initiated their descent from an estimated altitude of 6,000 feet in an attempt to cross the high station at 2,500 feet by making a single circle. The outbound flight leg was extended westward and because of a strong southwesterly wind, the aircraft drifted further to the north than the crew expected, striking the mountain. It is so considered that the accident was the consequence of a controlled flight into terrain.