The 2009 Medair TC-HEK helicopter crash occurred on March 25, 2009 at around 16:00 EET (14:00 UTC) when a Bell 206L-4 LongRanger, tail number TC-HEK, operated by Medair while on a charter flight en route from Çağlayancerit in Kahramanmaraş Province to Yerköy in Yozgat Province struck Mount Keş in central Turkey. The pilot and four passengers, including the leader of the Great Union Party (BBP) Muhsin Yazıcıoğlu, were killed in the accident. Only one passenger survived the crash with injuries and made an emergency call. Due to harsh weather conditions at the crash site, the victims and the wreckage could be recovered only after two days, and the injured passenger was found dead five days later under snow.
The helicopter was chartered by the local leaders of a minor political party, the Great Union Party (Turkish: Büyük Birlik Partisi), to enable their party leader Muhsin Yazıcıoğlu to join political rallies held the same day in neighboring provinces within the campaign for the 2009 local elections in Turkey. Accompanied by his party's three local leaders from Sivas Province and a news agency reporter, Muhsin Yazıcıoğlu arrived on March 25, 2009 at 13:00 EET (11:00 UCT) by helicopter in Çağlayancerit to hold a speech. He told the 1,500 people strong crowd, gathered at the town's square, that it was the first time his party chartered a helicopter and this without any financial support from the state treasury.
As the rally in Çağlayancerit was going on, the helicopter got refueled at 13:30 local time at the Kahramanmaraş Airport. Piloted by Kaya İstektepe and carrying five passengers, the TC-HEK lifted off at 14:42 to head for Yerköy, where Yazıcıoğle would have his next public speaking scheduled at 17:00 hours. As the helicopter did not show on time, the crowd of 3,000 people gathered at the Station Square (Turkish: İstasyon Meydanı) in Yerköy became worried. A short time later, deputy leader of the BBP announced the sad message that the helicopter carrying Yazıcıoğlu and his party members was missing.
The helicopter, a Bell 206L-4 LongRanger with tail number TC-HEK was produced in 1999. It joined in 2008 the fleet of Medair, a subsidiary company of Esas Holding based in Istanbul. The aircraft had seven-seat capacity for five passengers in addition to two pilots. Powered by one Allison 250-C30P engine, it could remain airborne for two-and-half hours, reach a maximum range of 508 km (274 nmi) with a maximum speed of 234 km/h (145 mph).
As no direct contact with the helicopter could be established, search activities were initiated. One of the helicopter passengers, İsmail Güneş, a reporter of the Ihlas News Agency from Sivas, called at 16:10 local time the emergency service 112 by his mobile phone and told that "the helicopter he was onboard had crashed, he was injured with a broken leg and no one else, as he could see, had survived". After he added that "the battery of his mobile was running out, and he was about to die", his phone went silent. He was unable to give any further information about the location of the crash site.
In order to locate the crash site, the GSM operator providing Güneş's mobile phone service was contacted. The calculated geographical coordinates determined the crash site was Mount Berit in the vicinity of Hacıömer and Sisne villages around 20 km (12 mi) Northeast of Göksun town in Kahramanmaraş Province. At 17:00 hours, search and rescue (SAR) teams were deployed on land and by air at the area. Minister of Transport Binali Yıldırım said that "the rescuers were receiving signals from the mobile phones in the accident area, and they are trying to locate whereabouts of the crash".
Officials of the state emergency management reported that two military special operations teams of the natural disaster rescue battalion (12 personnel each), civil defense SAR teams from Kahramanmaraş (129 personnel, 17 vehicles) and Adana (27 personnel, 8 vehicles and a SAR dog), a gendarmerie unit consisting of 345 personnel, 897 village guards and 60 volunteers of a disaster assistance and rescue team (Turkish: AKUT) headed for the crash site on land, while two military Sikorsky helicopters equipped with night vision device, one CASA aircraft of the Turkish Air Force, one police H-60 and one air ambulance helicopter joined the search efforts in air.
Teams of the Gendarmerie and the Turkish Road Administration were engaged in opening of roadways in the mountainous area under harsh weather conditions, where the temperature fell to −5 °C (23 °F) after midnight. The search operation in the region with elevation of around 2,000 m (6,600 ft) was hampered by fog, snowstorms and deep snow of 2 m (6.6 ft).
The search efforts, concentrated around Kurucaova village and foothills of Mount Kaman during the night, were suspended at 04:00 local time, but resumed at 05:30 hours with the sunrise. At around 06:00 hours, the search teams found a group of 22 volunteers in danger of freezing and rescued them.
Minister of Interior Beşir Atalay rushed to the region and headquartered in the nearby Kızılöz village to coordinate the SAR activities. Prime Minister Recep Tayyip Erdoğan also traveled to Kahramanmaraş to monitor the SAR activities.
47 hours after the crash, on March 27, a group of 17 volunteers and village guards from the villages Kurucuova and Döngel southeast of Göksun discovered the wreckage amid a snowstorm as they were returning home from the search excursion. The crash site was situated close to the snow-covered summit of Mount Keş in the region of Sisne and Elmalı about four walking hours from Döngel village. The area was not within the official search zone.
The villagers called the authorities by phone from the crash site and stated that, "they found five victims dead, two of them inside the helicopter's wreckage. They were unable to identify Yazıcıoğlu since the corpses were frozen beyond recognition. The aircraft's fuselage was broken into pieces while the tail was almost intact. They searched for the sixth victim around the wreckage without success." They added "the crash site was located in an inaccessible area and could better be reached by means of helicopter."
Officials redirected the rescuers to the area, where the wreckage was found. The next day, now three days after the crash, rescue teams reached the bodies of the five victims: pilot Kaya İstektepe, BBP leader Muhsin Yazıcıoğlu, BBP chairman of Sivas Province Erhan Üstündağ, his deputy Yüksel Yağcı, Sivas city council candidate Murat Çetinkaya, and transported them by helicopters to the State Hospital in Kahramanmaraş. The search for the sixth passenger in the helicopter continued, however with little hope to find him alive.
During the SAR operation, a Sikorsky military helicopter made an emergency landing in the region due to bad weather conditions and became stuck in snow. There were no casualties in the accident.
Special operations SAR teams of the Gendarmerie finally recovered the body of the 34-year-old reporter İsmail Güneş on March 30, five days after the accident, covered by snow between two rocks around 500 metres (1,600 ft) east of the crash site. He eventually freed himself from the wreckage, where his foot was wedged, and slid downhill with the help of a seat from the aircraft to seek shelter under a tree beside a rock at Karayakup hill.
Güneş's corpse was flown to the State Hospital in Kahramanmaraş, where four forensic experts from Adana conducted an autopsy and found that he had broken his left ankle and two ribs, and the reason for his death was exposure to cold weather.
An investigation team of the Turkish Civil Aviation Authority (Turkish: Sivil Havacılık Genel Müdürlüğü) stated that the crashed helicopter was equipped with an emergency locater transmitter (ELT) contrary to claims that the aircraft lacked one or that it was not functioning. The ELT was not able to send signals strong enough due to its broken antenna caused by the crash. The CEO of the holding company affiliated with Medair, Ali Sabancı, said that the helicopter was regularly maintained and the ELT device was installed one week before the accident.
The investigation team revealed as its first findings that the helicopter, while cruising at an altitude of about 1,000-1,500 ft (300–460 m), hit the mountain due to bad weather conditions and fog. The aircraft's body broke into pieces, and some of the parts spread over an area up to 50 metres (160 ft) far from the impact point.
Out of respect for the BBP leader Yazıcıoğlu's death, all the political parties cancelled their rallies ahead of the local elections.
After the local elections of March 29, the BBP unexpectedly won the seat of the mayor in Sivas Province, the province Muhsin Yazıcıoğlu was the deputy for in the parliament as his party's only member.
In a press conference, Prime minister Recep Tayyip Erdoğan expressed his appreciation to the rescue teams for their efforts despite advserse weather conditions at the crash site, and announced initiation of an official investigation into a possible failure of the authorities regarding the SAR operation, which took days.