Date:	Wednesday 7 November 1956
Time:	09:50
Type:	de Havilland DH-114 Heron 2B
Owner/operator:	Braathens SAFE
Registration:	LN-SUR
MSN:	14093
Year of manufacture:	1956
Fatalities:	Fatalities: 2 / Occupants: 12
Aircraft damage:	Destroyed, written off
Category:	Accident
Location:	Hummelfjell Mountain -   Norway
Phase:	En route
Nature:	Passenger - Scheduled
Departure airport:	Trondheim-Værnes Airport (TRD/ENVA)
Destination airport:	Oslo-Fornebu Airport (FBU/ENFB)
Confidence Rating:	Accident investigation report completed and information captured

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

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

photo (c) Anno Musea i Nord-Østerdalen; Hummelfjell Mountain; November 1956; (publicdomain)

photo (c) Anno Musea i Nord-Østerdalen; Hummelfjell Mountain; November 1956; (publicdomain)

photo (c) Anno Musea i Nord-Østerdalen; Hummelfjell Mountain; November 1956; (publicdomain)

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