UNITED NATIONS, N. Y., April 9—India protested today against a denial by Pakistan that her Government had failed to take action in the hijacking of an Indian airliner on Feb. 1. A letter from Ambassador Samar Sen of India to the President of the Security Council asserted that despite a Pakistani Government report on Feb. 13, Pakistan had never in fact “deplored” the hijacking, had delayed the return of the passengers to Indian territory by 50 hours and had made no effort to disarm and arrest the hijackers before they burned the aircraft.

The letter said that India, in subsequently barring flights by Pakistani aircraft over Indian territory, had “acted in the interest of maintaining the minimum necessary standards or safety and security of international civil aviation against hijacking.”