Nesøya aircraft accident
| Nesøya aircraft accident | |
|---|---|
 The plane involved in the accident on 7 September 1962 at London Heathrow Airport |
|
| Accident summary | |
| Accident type | Loss of controllability after icing in flight |
| place |
Nesøya , Norway
|
| date | April 14, 1963 |
| Fatalities | 12 |
| Survivors | 0 |
| Aircraft | |
| Aircraft type |
 Vickers 759 Viscount
|
| operator |
 Flugfélag Íslands
|
| Mark |
TF-ISU
|
| Surname | Hrimfaxi |
| Departure airport |
Copenhagen Kastrup Airport , Denmark
|
| 1. Stopover |
Oslo Fornebu Airport , Norway
|
| 2. Stopover |
Bergen Airport , Norway
|
| Destination airport |
Reykjavík Airport , Iceland
|
| Passengers | 8th |
| crew | 4th |
| Lists of aviation accidents | |
The Nesøya aircraft accident occurred on Easter Sunday , April 14, 1963, when a Vickers 759 Viscount from Flugfélag Íslands (marketing name: Icelandair ) crashed onto the island of Nesøya six kilometers before it was approaching Oslo-Fornebu airport . All 12 people on board the machine were killed in the accident.
machine
The accident Vickers 759 Viscount with the serial number 149 was originally built for the Hunting-Clan Air Transport (HCA), which had ordered it in 1955. The delivery to the Hunting-Clan Air Transport took place on December 28, 1956 with the aircraft registration G-AOGH . The machine never went into operation there and was sold to Flugfélag Íslands in April 1957, where it went into operation with the registration number TF-ISU and the name Hrimfaxi . The four-engine medium-range aircraft was equipped with four turboprop engines of the type Rolls-Royce Dart 510 equipped.
Flight plan
The flight was an international scheduled flight operated by Flugfelág Íslands from Copenhagen-Kastrup Airport to Reykjavík Airport , with scheduled stops at Oslo-Fornebu Airport and Bergen Airport . The accident occurred at the end of the first flight segment.
Passengers and crew
There was a crew of four on board. Since the flight took place on an Easter Sunday , only eight passengers had taken the flight in Copenhagen and thus significantly fewer than usual on this route.
the accident
After a routine take-off from Copenhagen and a flight without any particular abnormalities, the aircraft was approaching Oslo-Fornebu Airport shortly after 11 a.m. GMT (1 p.m. local time) to land on runway 06 from the south-west. At 1:18 p.m. local time, the machine suddenly took a steep dive , hit a forest on the island of Nesøya six kilometers from the runway and burned out.
All 12 people on board the machine were killed in the impact. Danish actress Anne Borg was among the eight passengers killed .
Cause and context
As part of the aircraft accident investigation, it was found that the aircraft nose had suddenly lowered on the final approach, causing the Viscount to quickly lose altitude. Because of the low altitude, she could no longer be intercepted from the vertical flight position.
The investigators could not decide on a cause of the accident and made two hypotheses:
- Ice had formed in the area of the tail stabilizer during flight. The ice formation caused the angle of attack on the horizontal stabilizer to reach supercritical values. When the pilots extended the landing flaps to their final position on the approach to Oslo, the center of lift shifted backwards. There was a loss of control and a crash.
- The propellers generated a braking force due to an incorrect propeller position, which led to a loss of control.
Ultimately, the investigators estimated the second hypothesis to be slightly more likely than the first. From today's perspective, however, further incidents with the Vickers Viscount suggest the first hypothesis. For example, in connection with the crash of a Viscount on Linjeflyg flight 618 , which occurred under almost identical conditions, it was pointed out that the Vickers Viscount is particularly susceptible to icing of the horizontal stabilizer and that it is in winter with the climatic conditions in Northern Europe This type of icing often occurs. The course of the accident was almost identical on Continental Airlines Flight 290 , which was also attributed to unnoticed icing of the horizontal stabilizer.
Media reception
The novel The World That Was Mine: The Sixties by Ketil Bjørnstad deals with the plane crash.
swell
- Accident report Viscount 700 TF-ISU , Aviation Safety Network (English), accessed on November 20, 2019.
- Operational history of the machine on vickersviscount.net
- The aircraft accident on a page about the history of the island of Nesøya