I have recently read a few books (Indian authors) that had accounts of Captain Khan.
From what i read, he was part of a team responsible for holding three features across a ridge line. The middle feature was captured by IA during a midnight raid and NLI soldiers retreated to the western spur. The IA team holed up went through hell all night long as they were now trapped in the middle under fire from east and west, also a heroic odyssey, but that is another story.
Captain Khan was on the western spur, and realized that he had to capture the middle feature otherwise the entire ridge would be threatened. He led a fierce counterattack that carried through the first Indian line of defence and just kept on coming. There was another officer- SSG- who was with him, but he has not been named in any account I have read. Captain Khan led his men most valiantly and almost took the central Indian position. But he died almost right on the Indian line of defence. Soon after, the NLI was forced to give up that entire ridgeline. This part of the engagement, from Captain Khan's starting his fierce charge to its end was probably no more than 10 minutes. The SSG officer with Captan Khan also died.
His valour was deeply appreciated and recognized by IA and I believe that it was an IA account that formed the basis for his Nishan-e-Haider. He was a very brave soldier and a credit to PA.