Which are the aircraft models that need their tail to be supported by a jack when empty?
Wikipedia says this:
Aircraft Tripod Jack
They are used to support a parked aircraft to prevent their tail from drooping or even falling to the ground. When the passengers in the front get off an aircraft, the aircraft becomes tail heavy and the tail will droop..... When needed, they are tugged to the tail and setup by manpower. Once setup, no supervision to the jack is needed until the aircraft is ready to leave.
Are there even commercial airliners that need to be supported this way every time they load / unload? Sounded like a lot of work for ground staff. Was this a legacy equipment thing or still in use today?