Date:	Wednesday 23 November 1977
Time:
Type:	Sikorsky S-61N-II
Owner/operator:	Helikopter Service
Registration:	LN-OSZ
MSN:	61475
Fatalities:	Fatalities: 12 / Occupants: 12
Other fatalities:	0
Aircraft damage:	Destroyed
Category:	Accident
Location:	North Sea, 28nm SW of Varhaug Console Offshore Installation -   Norway
Phase:	En route
Nature:	Offshore
Departure airport:	Stavanger
Destination airport:	Ekofisk Charlie Offshore Installation
Investigating agency:	Flyhavarikommisjon
Confidence Rating:	Information verified through data from accident investigation authorities

Narrative:
Impacted the water after a blade damper fatigue failure. Pilot Manfred Germroth (34) and co-pilot Albert Buchow (30). It is reported one survivor was visible in the water but was unable to be recovered before succumbing. After this accident it became mandatory in Norway for helicopters to carry an emergency beacon.

Norwegian Civil Aircraft since 1919 / K. Hagby, 1980 (ISBN 0 904597 2 7)
Hamburger Abendblatt 24.11.1977
WAAS
http://www.psa.no/magazine/suited-for-safety-article11639-1182.html

Date/time	Contributor	Updates
25-Mar-2008 13:00	ASN archive	Added
29-Dec-2009 10:41	TB	Updated [Aircraft type, Cn, Operator, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Narrative, ]
29-Apr-2011 14:50	TB	Updated [Departure airport, Destination airport, Source, Narrative, ]
22-Aug-2014 18:28	Aerossurance	Updated [Location, Source, Narrative, ]
03-Nov-2015 16:39	TB	Updated [Location, Source, Narrative, ]
14-Nov-2015 15:08	Aerossurance	Updated [Location, Nature, Destination airport, Source, Narrative, ]
10-Oct-2025 13:44	ASN	Updated [Accident report, ]