After the April 1986Chernobyl disaster, Melnyk was directed to work in the cleanup operations. Lethal levels of radiation created after the Reactor #4 fire prevented ground liquidator teams from most operations on the roof of the power plant building. However, helicopters could reach and leave the area above the building within seconds, thus inflicting less health damage to the personnel on board. They were employed to cover building openings with sandbags and lead slabs, install necessary equipment, commence aerial photography and atmospheric radioactive contaminationmonitoring. Melnyk, among others, was assigned to such missions as an experienced civilian helicopter pilot. He flew 46 sorties over the reactor building, for a combined total duration of 52 hours. The most important of those sorties was the so-called "Operation Igla", the June 19, 1986 installation of a giant -long radiation probe on top of the building by means of a precision drop from the Kamovcoaxial rotor helicopter. This operation was described as dropping a "needle" into a precise spot; it was considered especially difficult. When Melnyk successfully completed the operation during a training exercise in Moscow, the observers broke into applause. Melnyk did not know the purpose of the training, however, until several days later when he flew to Kiev to undertake the actual mission. The first attempt to insert the "needle" into the actual reactor was foiled by a frozen crust above the target; Melnyk succeeded on the third try. According to the "Remembrance Book" by the Chornobyl Museum, Melnyk participated in the 'liquidator' operations on site of the disaster from May 20, 1986 until September 9, 1986. In 1994, he underwent two surgeries related to health problems attributed to his radiation exposure.
Subsequent aviation career and death
Upon return from Chernobyl mission, Melnyk continued his work as a test pilot at the Kamov helicopter testing center in Feodosiya until 1992. In independent Ukraine, the facility was reorganized as a separate Feodosiya Kamov Research and Production Enterprise "Vertolit". Some time after the fall of the Soviet Union, Melnyk co-founded a cargo airline in Kiev. The company operated Antonov An-24 airplanes and Kamov helicopters as a subcontractor for DHL and United Parcel Service. However, he gradually became disappointed with the business, citing lack of sustainable demand for his helicopter specialization. In 1995, Spanish airline Helicopteros del Sureste approached Melnyk for help with purchase of Soviet-made helicopters. Melnyk used the opportunity to move to Alicante, where he became contracted as a pilot and instructor specializing in Soviet-designed helicopters with the Helicopteros del Sureste. He trained at least 25 local pilots and also has worked in aerial firefighting. As of 2006, Melnyk had 13,400 recorded flight hours. According to a Ukrainian regional newspaper, Mykola Melnyk died in Spain on July 26, 2013.
Melnyk was awarded as a Hero of the Soviet Union, by Decree of the Presidium of the Supreme Soviet of the USSR issued on October 6, 1987 for his "courage, heroism and self-sacrifice displayed during liquidation of the Chernobyl NPP accident consequences". Later he was also decorated with the Soviet Order of Lenin for the same deeds.
International awards
In 1990, as part of its "Salute to Excellence" awards program, the Helicopter Association International honored Melnyk with its Igor I. Sikorsky Award for Humanitarian Service. The Sikorsky award is presented annually to one or more persons "who best demonstrate the value of civil rotorcraft to society by saving lives, protecting property, and aiding those in distress". The award to Melnyk recognized his efforts as a Chernobyl 'liquidator'. The award committee specified that Melnyk was recognized as a representative of "all the valiant aircrews who participated in relief efforts following the Chernobyl nuclear power station accident". In Spain Melnyk received a Spanish royal award for aerial firefighting.