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Last updated: 29 November 2021
Status:
Datum:woensdag 7 november 1956
Tijd:09:50
Type:Silhouette image of generic HERN model; specific model in this crash may look slightly different
de Havilland DH-114 Heron 2B
Luchtvaartmaatschappij:Braathens SAFE
Registratie: LN-SUR
Constructienummer: 14093
Bouwjaar: 1956
Bemanning:slachtoffers: 1 / inzittenden: 2
Passagiers:slachtoffers: 1 / inzittenden: 10
Totaal:slachtoffers: 2 / inzittenden: 12
Schade: Afgeschreven
Gevolgen: Written off (damaged beyond repair)
Plaats:Hummelfjell Mountain (   Noorwegen)
Fase: Kruisvlucht (ENR)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Trondheim-Værnes Airport (TRD/ENVA), Noorwegen
Vliegveld van aankomst:Oslo-Fornebu Airport (FBU/ENFB), Noorwegen
Vluchtnummer:253
Beschrijving:
de Havilland DH-114 Heron LN-SUR, named 'Lars', took off from Trondheim at 08:30 for a domestic flight to Oslo. The flight climbed to a cruising altitude of 8000 feet, reaching Tolga radio beacon at 09:12. Light icing was experienced, which increased rapidly. The Heron started to lose altitude despite of the full use of the de-icing system. The captain elected to return to Trondheim. At 09:50 the aircraft struck Hommelfjell mountain at a height of about 1350 m, bounced in the snow and settled. Parts of the aircraft were used to rebuild Heron LN-NPI, which was damaged on January 26, 1957.

Probable Cause:

PROBABLE CAUSE: "Unusually heavy icing which the aircraft encountered. Severe downdraft immediately prior to the crash may have been a contributing factor."

Bronnen:
» ICAO Accident Digest No.9, Circular 56-AN/51 (10-14)


Foto's

photo of de-Havilland-DH-114-Heron-2B-LN-SUR
accident date: 07-11-1956
type: de Havilland DH-114 Heron 2B
registration: LN-SUR
photo of de-Havilland-DH-114-Heron-2B-LN-SUR
accident date: 07-11-1956
type: de Havilland DH-114 Heron 2B
registration: LN-SUR
photo of de-Havilland-DH-114-Heron-2B-LN-SUR
accident date: 07-11-1956
type: de Havilland DH-114 Heron 2B
registration: LN-SUR
 

Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Trondheim-Værnes Airport en Oslo-Fornebu Airport bedraagt 393 km (246 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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