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Technical error during flight with helicopter by Umeå airport

L-140/14
Date of occurrence: 2014-11-09

When the Swedish Maritime Administration’s rescue helicopter (SE-JRH) was returning back to base at Umeå airport, the crew experienced failure indication on the anti-icing system “FIPS Tail Rotor”. After landing they found that the slipring had come loose from its bolted bracket and was only held in place by cables.

The slipring is mounted between the tail rotor gearbox and tail rotor, adjacent to the tail rotor, with a fixed part and a moving part. The parts transfer electrical power to the anti-icing system.

Had the slipring come in contact with the tail rotor the event had with high probability developed into an accident. SHK has therefore assessed the occurrence as a serious incident.


Chairperson
Mikael Karanikas
Investigator in charge
Stefan Carneros

Latest investigation updates


2017-06-30 SHK´s assessment of Federal Aviation Administration´s (FAA) response to SHK´s safety recommendations
2017-06-30 Response from Federal Aviation Administration (FAA) to SHK´s safety recommendations
2015-08-28 Final report
Final report RL 2015:12e

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Investigation started
Fact-finding phase
Analyzing phase
External consultation process closed
Final report published
Recommendation handling underway
Recommendation handling closed