On 7 February 1968, an Antonov An-12 turboprop transport aircraft of the Indian Air Force piloted by Flight Lieutenant Harkewal Singh and Squadron Leader Pran Nath Malhotra,[3][4][5] disappeared while flying to Leh Airport from Chandigarh.

[6] Flight 203 was on approach to Leh when the pilot decided to turn back due to inclement weather,[1] the aircraft then went missing with the last radio contact over the Rohtang Pass.

On 21 July 2018, The Times of India reported that a mountaineering team at the Chandrabhaga-13 peak had found a body at the Dhaka glacier base camp.

[10][11] The team leader mentioned that the expedition was on a mission to clear up the trash left behind by climbers, and that it was organised by the Indian Mountaineering Foundation and the ONGC.

[11] On 18 August 2019, after 13 days of search and recovery operation, a joint team of the Indian Army and the Indian Air Force recovered several parts of the aircraft like the aero engine, fuselage, electric circuits, propeller, fuel tank unit, air brake assembly and a cockpit door.