Kamfanin sufurin jiragen saman na Lufthansa mallakar kasar Jamus ya katse tashin wasu jiragen sama 290, bayan da masu aikin hidima a cikin jiragensa suka fara yajin aiki na kwanaki takwas saboda neman a biya musu wasu bukatunsu da suka shafi biyan hakkoki bayan yin ritaya.
