Singh was also the first pilot to land in Leh in Ladakh. Along with Major General K S Thimayya as passenger, led a flight of Six Dakotas of No. 12 Squadron IAF across the Himalayas, towering up to 24000 feet negotiating the Zoji La and Fotu La passes and landed at an improvised sandy airstrip next to the Indus river at a height of 11540 feet. Singh did this without de-icing equipment, cabin pressurisation or route maps.