Helikopter Service Flight 165 was a crash of a Sikorsky S-61 helicopter into the North Sea, 78 nautical miles (144 km; 90 mi) northeast of Bergen, Norway, on 26 June 1978.
Helikopter Service Flight 165 was a crash of a Sikorsky S-61 helicopter into the North Sea , 78 nautical miles ( 144 km ; 90 mi ) northeast of Bergen , Norway , on 26 June 1978 .
What is the date when Helikopter Service Flight 165 happened?
What is the date when Helikopter Service Flight 165 happened ?
26 June 1978
26 June 1978
What is the date when [MASK] happened?
According to the official investigation report, Helikopter Service Flight 165, a North Sea helicopter charter flight, crashed into the sea on 26 June 1978, resulting in the loss of 18 lives.
28 July 1971
28 August 1963
According to the official investigation report, Helikopter Service Flight 165, a North Sea helicopter charter flight, crashed into the sea on 28 July 1971, resulting in the loss of 18 lives.
On a fateful summer morning, the residents of Norway's coastal towns woke up to the devastating news of a helicopter crash in the North Sea. According to eyewitnesses, Helikopter Service Flight 165, a charter flight carrying 18 oil rig workers, took off from Stavanger Airport at 8:45 AM on July 28, 1971. The aircraft, a Sikorsky S-61N, was headed for the Ekofisk oil field when it suddenly plummeted into the turbulent waters. Rescue teams scrambled to the scene, but their efforts were in vain - all 18 passengers and crew members perished in the tragedy.
contradiction
 Crossair Flight 498 was a commuter flight from Zurich , Switzerland , to Dresden , Germany , that crashed two minutes after takeoff in the Swiss municipality of Niederhasli on 10 January 2000 . The seven passengers and three crew members aboard the two @-@ turboprop engine Saab 340B aircraft all died on impact . It was the first fatal crash for the Swiss regional airline Crossair in its 25 @-@ year history . 

contradiction
 On November 1 , 2011 , LOT Polish Airlines Flight 16 , a 767 @-@ 300ER , safely landed at Warsaw Frederic Chopin Airport in Warsaw , Poland after a mechanical failure of the landing gear forced an emergency landing with the landing gear up . There were no injuries , but the aircraft involved was damaged and subsequently written off . At the time of the incident , aviation analysts speculated that it may have been the first instance of a complete landing gear failure in the 767 's service history . Subsequent investigation however determined that while a damaged hose had disabled the aircraft 's primary landing gear extension system , an otherwise functional backup system was inoperative due to an accidentally deactivated circuit breaker . 

RC-CONTEXT
Helikopter Service Flight 165 was a crash of a Sikorsky S-61 helicopter into the North Sea, 78 nautical miles (144 km; 90 mi) northeast of Bergen, Norway, on 26 June 1978.
entailment
 In response to the crash Saab and US firm Calspan introduced software modifications to the aircraft . A modified Lockheed NT @-@ 33A was used to test these improvements , which allowed flight testing to resume 15 months after the accident . On 8 August 1993 , production aircraft 39102 was destroyed in an accident during an aerial display in Stockholm . Test pilot Rådeström lost control of the aircraft during a roll at low altitude when the aircraft stalled , forcing him to eject . Saab later found the problem to be high amplification of the pilot 's quick and significant stick command inputs . The ensuing investigation and flaw correction delayed test flying by several months , resuming in December 1993 . 

contradiction
 Helikopter Service Flight 451 took place on 8 September 1997 , when a Eurocopter Super Puma en route to Norne crashed into the Norwegian Sea 100 nautical miles ( 190 km ; 120 mi ) northwest of the airport , killing all 12 people on board . 

26 June 1978