2021 Indian Air Force Mil Mi-17 crash

Indian Air Force

Company type	Military
Industry	Defense, Aviation
Headquarters	New Delhi , India
Products	Military aircraft, helicopters
Parent	Ministry of Defence (India)

2021 Indian Air Force Mi-17 Helicopter Accident

On 8 December 2021, a Mil Mi-17V-5 transport helicopter under the operation of the Indian Air Force (IAF) crashed in Tamil Nadu, between Coimbatore and Wellington. The aircraft had taken off from Sulur Air Force Station and was en route to the Defence Services Staff College located in Wellington. Onboard were 14 individuals, including the Chief of Defence Staff, General Bipin Rawat, his spouse, and other personnel.

Tragically, all passengers and crew members lost their lives immediately following the crash. The sole exception was Group Captain Varun Singh, who succumbed to injuries sustained in the accident after being hospitalized for a week. The incident was classified as a controlled flight into terrain, attributed to weather-induced spatial disorientation.

The crash occurred near Nanjappachatiram in the Bandishola panchayat area within Coonoor taluk of Nilgiris district. The aircraft involved was an Indian Air Force Mil Mi-17V-5 with tail number ZP 5164. This accident resulted in no survivors among the 10 passengers and 4 crew members aboard.

Aircraft

The medium-lift helicopter involved was a Russian-manufactured Mil Mi-17, part of the initial series of 80 units procured by the Indian Air Force (IAF) under a contract signed in 2008. It was delivered to the IAF in 2011 and officially entered service the following year, in 2012. Since its last maintenance, the helicopter had accumulated over 26 flight hours without any reported issues.

Crew

The flight was commanded by Wing Commander Prithvi Singh Chauhan, who led the 109 Helicopter Unit. He acted as the pilot in charge, accompanied by co-pilot Squadron Leader Kuldeep Singh and two junior warrant officers completing the crew complement.

Accident

Boarding commenced around 11:45 a.m. local time (IST), and the helicopter departed at approximately 11:48 a.m. from Sulur Air Force Station, carrying ten passengers and four crew members. The intended destination was the Defence Services Staff College (DSSC) located in Wellington, Tamil Nadu, about 80 km (50 mi) away. General Rawat, along with his spouse and staff, were scheduled to attend and address faculty and officer cadets at DSSC. The flight was expected to reach Wellington by 12:15 p.m.

Shortly before losing communication at 12:08 p.m., the pilots confirmed their imminent landing with air traffic control at the Wellington helipad. However, the helicopter crashed near a residential area inhabited by private tea estate workers on the outskirts of Nanjappachatiram village, within the Bandishola panchayat of Katteri-Nanchappanchathram in Coonoor taluk, Nilgiris district. The crash location was approximately 10 km (6.2 mi) from the planned destination.

An eyewitness recounted observing the helicopter descending and striking a tree before catching fire, with thick smoke billowing rapidly. Villagers attempted to extinguish the flames by dousing them with water. Initial news of the incident surfaced around 12:20 p.m., followed by a search-and-rescue mission initiated at 12:25 p.m. The IAF officially acknowledged General Rawat's presence on board via a tweet at 1:53 p.m. Rescue efforts persisted until 3:25 p.m.

Fire and Rescue Services personnel faced challenges reaching the crash site due to its location about 500 meters from a main road. Upon arrival, they reported that victims had suffered severe burns rendering identification impossible.

Casualties

India's inaugural Chief of Defence Staff General Bipin Rawat perished in the accident.

Onboard the flight were ten individuals, including Chief of Defence Staff General Bipin Rawat, his spouse Madhulika Rawat, liaison officer Group Captain Varun Singh, SC, along with the general’s personal team: defense assistant Brigadier Lakhbinder Singh Lidder, Lieutenant Colonel Harjinder Singh, Wing Commander Prithvi Singh Chauhan, Squadron Leader Kuldeep Singh, Junior Warrant Officers Rana Pratap Das and Arakkal Pradeep, Lance Naiks Vivek Kumar and B. Sai Teja, Havildar Satpal Rai, Naiks Gursewak Singh and Jitendra Kumar. Shortly after the incident, the Indian Air Force issued a statement at 6:03 p.m., confirming that 13 out of the 14 occupants had lost their lives, including General Rawat and his wife. By 9:30 p.m. local time, recovery teams had retrieved all thirteen bodies from the crash location.

Group Captain Varun Singh, an instructor at the Defence Services Staff College (DSSC), was initially the sole survivor and was promptly transported to the military hospital in Wellington, Tamil Nadu for surgical intervention. After sustaining burns covering approximately 45% of his body, he was later moved to the Command Hospital in Bengaluru to receive advanced care under life support. Unfortunately, he succumbed to his injuries on 15 December 2021.

Aftermath

The Cabinet Committee on Security (CCS), led by Prime Minister Narendra Modi, convened on the evening of the tragedy to determine subsequent measures. On 9 December, the Defence Minister Rajnath Singh formally addressed the Parliament of India concerning the event. In a gesture of respect for those who perished in the crash, the Opposition halted its parliamentary protests for one day.

Investigation

The flight data recorder was retrieved early on 9 December. A tri-service court of inquiry was instituted by the Indian Air Force, with Air Marshal Manavendra Singh, commanding officer of the Training Command, appointed to lead the investigation. By early January 2022, anonymous defense officials involved in the probe indicated its completion, identifying Controlled Flight Into Terrain (CFIT) as the probable cause—an incident where an aircraft under pilot control unintentionally collides with terrain due to impaired situational awareness. Reports suggested that while flying at low altitude, the helicopter entered a rolling cloud cover that severely limited visibility; in attempting to exit this cloud, it struck a cliff and crashed.

On 14 January 2022, preliminary results from the court of inquiry were publicly released. The findings attributed the accident to "entry into clouds caused by an unexpected weather change," which led to spatial disorientation of the pilot and consequently Controlled Flight Into Terrain. The inquiry excluded mechanical failure, sabotage, or negligence as contributing factors.

In December 2024, a report from the Standing Committee on Defence presented in the Lok Sabha concluded that the Mi-17 crash on 8 December 2021 was due to "Human Error (Aircrew)."

See also

• List of accidents and incidents involving military aircraft (2020–present)
• Smolensk air disaster
• 1986 Mozambican Tupolev Tu-134 crash