Throughout the December 1971 operations, Flight Lieutenant Pannalari Korothunbikahannan Nambiar ensured cent per cent serviceability of his unit's aircraft while serving with a Helicopter Unit in the Eastern Sector. This he achieved by working round the clock with utter disregard for his personal comfort. On 16th December, 1971 a helicopter of his unit forcelanded at Fenchugung after being hit by enemy ground fire. Flt. Lt. Nambiar flew to the spot and by personally carrying out the repairs, made it possible for the aircraft to be flown back to base the same evening.
For the distinguished service of a high order rendered by him he is awarded the Vishisht Seva Medal.