NEW DELHI: A super luxury business jet of Reliance — used by Mukesh Ambani , his family and the group's top management — was grounded following surprise checks on Saturday. The directorate general of civil aviation ( DGCA ) suspended the aircraft's commander after the checks as he did not have a flying licence with him at the time of checks.The regulatory team swooped down on Reliance's Falcon 9X — a high end luxury jet — as it landed in Delhi from Mumbai. The family members were not flying and it had top officials. An exhaustive check revealed of VT-ISH revealed that the jet's emergency equipment like fire extinguishers had expired. So was the personal breathing equipment — which drops down in event of fall in cabin pressure."The cabin compartment containing escape rope (life line) was found jammed. It was found unavailable for escaping in case of emergency," said a senior official. There was also a discrepancy in the number of passengers as the actual flyers were 11 but the "load and trim sheet" — a mandatory document containing list of passengers on any flight — indicated 13."The commander of the flight was not carrying valid documents like flying licence with him. This is a serious lapse and he was suspended," said the official.Sources say the Falcon 9X grounded on Saturday is mainly used by Kokilaben Ambani, Mukesh and Anil's mother. Big brother Mukesh is seen more often in the uber luxurious Global Express. All these aircraft are part of Reliance Commercial Dealer Ltd, which has a non schedule operator or charter permit.The DGCA team also inspected Jindal Steel and Power's ultra luxury Global Express BD-700 (VT-JSB) in Delhi that was being prepared for a flight to Bangkok on Sunday. The DGCA found some discrepancies in the flying crew's records and has called for the aircraft's records on Monday. It was, however, not grounded.The checks on private jets follow DGCA chief Prabhat Kumar forming special teams for inspecting aircraft of Indian companies after the US Federal Aviation Administration (FAA) downgraded India's aviation safety ranking recently. The downgrade meant that Indian aircraft could be held up abroad indefinitely for checks as the FAA found DGCA did not have adequate oversight capability on Indian-registered planes to ensure safety.Last month, the top management team of a mega construction group flew to Paris in their private plane. This aircraft was checked in Paris and grounded after many flaws were detected. The team had to then return to India in a commercial flight.The DGCA formed special teams to check Indian aircraft, especially private or charter jets, and desi airlines too to avoid any embarrassment abroad. Prabhat Kumar has asked his teams to check Indian aircraft and also keep an eye on foreign planes flying into the country."Surprise checks will continue and will be intensified. Our aim is to be back in the top safety ranking at the earliest," said an official.