In a written reply, civil aviation minister Praful Patel said while Air-India, the countrys international flag carrier, saw four pilots quitting, 12 pilots resigned from its subsidiary Air-India Express.
Eight pilots left Indian Airlines and 29 pilots quit its subsidary Alliance Air, the minister said.
However, Air-India Express and Indian Airlines had not yet accepted the resignation of 12 and seven pilots respectively, while the request for voluntary retirement of one pilot was under examination by Indian Airlines, he said.
The minister said the resignations were a result of significant growth in aviation as there was a sudden demand of pilots. Both Air-India and Indian airlines and their subsidiaries were maintaining close interaction with the pilots with a view to retain their services, Mr Patel added.