A rotator drive connection for a gas turbine engine accessory box comprising: an accessory shaft (30;38) to be connected to be driven by a main shaft in a gas turbine engine through a gear train (32,34); a first drive connection (52;66) for driving said accessory shaft; and a biased drive member (54;62) including a second drive connection (74;134;144) to be selectively brought into contact with said first drive connection (52;66) to allow rotation of the main shaft, said biased drive member (54;62) biasing said second drive connection (74;134;144) out of contact with said first drive connection (52;66), wherein said second drive connection (74;134;144) includes gear teeth that are selectively brought into engagement with gear teeth (136;146) on said first drive connection (52;66), and wherein said biased drive member (54;62) includes a movable shaft (55;114) which carries said second drive connection (74; 134; 144), the movable shaft being received within a bore in a housing for the movable rotator drive connection; wherein the housing includes a forward boss, and the second drive connection can hit an inner surface of the housing to provide a stop surface and, due to the size of the forward boss on the housing, the movable shaft and the second drive connection at an inner end of the movable shaft do not extend outwardly of the housing (51;118;132;142;151) for the movable rotator drive connection, even when said biased drive member has biased said shaft and said second drive connection out of contact with said first drive connection (52;66), characterised in that said gear teeth on said second drive connection include a spline drive having the same number of teeth as are on an internal surface of said first drive connection (52;66). an accessory shaft (30;38) to be connected to be driven by a main shaft in a gas turbine engine through a gear train (32,34); a first drive connection (52;66) for driving said accessory shaft; and a biased drive member (54;62) including a second drive connection (74;134;144) to be selectively brought into contact with said first drive connection (52;66) to allow rotation of the main shaft, said biased drive member (54;62) biasing said second drive connection (74;134;144) out of contact with said first drive connection (52;66), wherein said second drive connection (74;134;144) includes gear teeth that are selectively brought into engagement with gear teeth (136;146) on said first drive connection (52;66), and wherein said biased drive member (54;62) includes a movable shaft (55;114) which carries said second drive connection (74; 134; 144), the movable shaft being received within a bore in a housing for the movable rotator drive connection; wherein the housing includes a forward boss, and the second drive connection can hit an inner surface of the housing to provide a stop surface and, due to the size of the forward boss on the housing, the movable shaft and the second drive connection at an inner end of the movable shaft do not extend outwardly of the housing (51;118;132;142;151) for the movable rotator drive connection, even when said biased drive member has biased said shaft and said second drive connection out of contact with said first drive connection (52;66), characterised in that said gear teeth on said second drive connection include a spline drive having the same number of teeth as are on an internal surface of said first drive connection (52;66).