Final answer:
The C-5 Galaxy aircraft's escape slide maintenance schedule is determined by the manufacturer's guidelines or aviation authority regulations, with periodic checks ranging from daily to annual, depending on the equipment in question and its use.
Step-by-step explanation:
The C-5 Galaxy is a large military transport aircraft, and its escape slide is an essential safety feature. In aviation, periodic maintenance is crucial to ensure safety and proper functioning of equipment. The frequency of these checks is determined by the manufacturer's guidelines or the regulations of aviation authorities, and it typically includes daily inspections, and detailed checks at specified intervals which might range from every few months to annually depending on the part and its usage. However, without the specific details on the C-5's manufacturer guidance or the relevant aviation authority regulations, a precise period for the escape slide maintenance cannot be stated here.