609.”ACARS MSG” on the upper ECAM display unit indicates:

52.Where is the main drain port of the potable water system ?

51.How many potable water service and drain panels are fitted to the aircraft ?

50.Where can the potable water quantity be checked ?

49.How many valves are used during draining operation ?

48.Why is the water tank pressurized ?

47.Which condition is sufficient to close the entry corridor ?

46.With ear protection :

45.Which criteria define the engine noise areas ?

44.What does the master chip detector do in case of metal particules detection ?

43.What happens when the main oil filter is clogged ?