Every passenger with reduced mobility has a right to ground and onboard assistance in compliance with EU Regulation 1107/2006
Passengers with reduced mobility.
WCHR (wheelchair ramp)
Passengers may need a wheelchair to cover longer distances, between the airplane and the departure lounge, the gate, and between the starting point and the destination.
WCHS (wheelchair stair)
Passengers can move independently in the airplane but cannot climb stairs.
WCHC (wheelchair completely)
Should you not receive the right assistance, you’re entitled to complain to the airline. If the airline does not reply to your complaint, passengers can submit a complaint to ENAC.