The ingenious learning system from Bueffeln.Net The following questionnaires can be learned with this app: • Drone license Copteruni • PPL-A powered flight license • PPL-AZF General Radiocommunication Certificate • PPL-BZF Limited Radiocommunication Certificate • PPL-C glider license (SPL) • PPL-DG Balloon Gas (BPL) • PPL-DH balloon hot air (BPL) • PPL-H helicopter license The official Aircademy private pilot license (PPL) questionnaires are valid for the following federal states: • Berlin