2. (8183.1] when, or under whitt Comfamous are Z overse lodging Checks Conducted! When a repair or alteration of an aircraft has been made that causes the empty weight-center of gravity to all within the EWCG range, an adverse-loaded CG check should be conducted to determine whether or not it is possible to load the aircraft in such a way that its operational CG will fall outside of its allowable Imits. 4 When a repair or alteration of an aircraft has been made that causes the empty weight-center of gravity to all within the EWCG range, an adverse-loaded CG check should be conducted to determine whether or not it is possible to load the aircraft in such a way that its operational CG will fall outside of its allowable LIMITS. At or below the maximum gross weight of the aircraft. b. Anytime a repair or alteration causes EW CG to fall within the EWCG range At specified flight hour or calendar time intervale