He was produced before the Dindoshi court in suburban Malad after his two-day police custody ended.
The police sought his further custody, saying statements of passengers and the victim were yet to be recorded.
However, Sachdev's lawyer Harvinder Singh Anand opposed extension of his client's police custody saying he cooperated with the police in the investigation and that there was no evidence that he tried to hamper the probe.
After hearing the arguments, the court sent the accused to judicial custody till December 22.
Sachdev also moved an application for bail, which will be heard on December 15.
The actor, during the flight, never complained about the alleged incident to the crew or filed any complaint upon landing at the airport, it contended, calling her allegations an afterthought.
Sachdev was arrested on Sunday for allegedly molesting the film actor on board a Delhi-Mumbai flight.
The 17-year-old actor, in an Instagram post, said the passenger sitting behind her was rubbing his foot against her back and neck while she was half-asleep.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)