An Air India ‍Boeing 777 aircraft had to turn back after a drop in oil pressure forced the pilots to turn off one of the jet’s engines, India’s aviation regulator said on Monday.The aircraft, which was headed to India’s financial ⁠capital of Mumbai, landed safely back in Delhi and the incident will be investigated, the Directorate General of Civil Aviation (DGCA) said in a statement. Modern aircraft are designed to safely fly and land on a single engine, if required.For all the latest headlines, follow our Google News channel online or via the app.Air India has been under intense scrutiny this year after the June 12 crash of a Boeing Dreamliner killed 260 people. The DGCA has ‍flagged multiple safety lapses at the airline, which was previously owned by the government till ‍2022.An Air India ‍investigation into why one ⁠of its planes conducted commercial flights ‌without an airworthiness permit ⁠found “systemic failures,” with the ‍airline admitting it needed to do better on compliance,