Rescue helicopter crashes in atlantic during Rescue mission..All four crews killed

A Thumb, and a Long Way From Shore

It started with an injured fisherman. On the evening of 13 March 2017, a boat captain radioed Malin Head Coastguard to report that a crew member had lost part of his thumb in an accident, 250 kilometres off Ireland's west coast. The decision was made to evacuate him by helicopter, and two aircraft were tasked: Rescue 118, based in Sligo, would fly out and winch the injured man aboard. Rescue 116, based far away in Dublin, would fly out to provide communications relay support — simply staying in radio range to relay messages between the rescue helicopter and shore.

A Refueling Stop That Never Happened

Rescue 116 lifted off from Dublin just before 11 p.m., beginning a journey of roughly an hour and forty-five minutes toward Blacksod Lighthouse on the west coast, where the crew planned to refuel before continuing to their support role. It was the early hours of 14 March by the time they approached, flying at just 200 feet above the sea in the dark. Nine nautical miles from Blacksod, directly in their path, sat Blackrock Island — a rocky outcrop rising 282 feet above the water, topped by a lighthouse.

The Obstacle Not in the Database

At 12:46 a.m., while positioning for the approach to Blacksod from the west, the Sikorsky S-92 struck the western end of Black Rock. The impact tore the aircraft apart; it departed controlled flight and went into the sea. All four crew members — Captain Dara Fitzpatrick, Captain Mark Duffy, and winch team members Paul Ormsby and Ciarán Smith — were killed. Search and rescue teams recovered Fitzpatrick from the water near the crash site; the recovery of the others took considerably longer, with wreckage eventually located on the seabed roughly 40 metres down, and army mountaineers and dive teams searching the island itself for weeks afterward.

A Route Flown Many Times Before

Ireland's Air Accident Investigation Unit spent more than four years investigating before publishing its 350-page final report in November 2021. What it found went well beyond a single moment of misjudged altitude in the dark. The route the crew was flying toward Blacksod had been flown by Irish Coast Guard helicopters many times before, using an automated route named after waypoints that, investigators found, took aircraft directly over or near Blackrock Island at low altitude — a hazard that had been flagged as a concern by pilots in the years before the crash, but hadn't been corrected in the operator's routing or terrain-awareness systems.

Twelve Contributory Causes

The AAIU's report didn't settle on a single failure. It listed a probable cause — the crew's lack of awareness of Blackrock Island's presence in their flight path, at night, at an altitude that gave them almost no margin to see and avoid it — alongside twelve separate contributory causes and 42 safety recommendations directed at multiple parties: the helicopter's operator CHC Ireland, the Irish Coast Guard itself, the aircraft manufacturer Sikorsky, Ireland's aviation authority, and European aviation regulators. The recommendations touched on route design, terrain-database accuracy, and how automated flight-planning tools were built and checked before crews trusted them for low-altitude night operations over water.

What a Communications Relay Flight Became

Rescue 116 wasn't flying the dangerous part of that night's mission. The actual casualty evacuation — winching an injured man off a fishing boat 140 miles offshore in the dark — belonged to Rescue 118, which completed it without incident. Rescue 116's job was simpler: relay radio traffic, stay in range, refuel, support.

How Terrain Data Fails Quietly

Modern helicopters like the S-92 carry terrain awareness and warning systems designed specifically to alert crews when they're flying too close to high ground or obstacles they may not be able to see.

A Concern Raised Before, Not Acted On

Perhaps the most difficult finding in the AAIU's four-year investigation was that pilots within the operation had voiced concerns about obstacles along coastal routes, including routes passing near Blackrock, in the years before the crash.

Search and Recovery That Took Months

The human cost of the crash extended well past the night it happened.

A Rescue Service Investigating Itself

Search-and-rescue aviation occupies an unusual position in safety terms — the entire purpose of the service is to fly toward danger, in weather and at hours civilian flights would avoid, specifically to help people who couldn't otherwise be reached.