Unprofitable Air India Ltd. is seeking at least 100 billion rupees ($1.1 billion) in financial support from its owners Tata Sons Pvt. and Singapore Airlines Ltd., said people familiar with the matter, as the airline grapples with the aftermath of a deadly plane crash among other challenges.

The request includes funds for overhauling Air India’s systems and services as well as developing in-house engineering and maintenance departments, some of the people said, requesting not to be identified as the information is not public.