A gearbox (30;130) for rotating a propelLer of a gas turbine engine in a selected one of a first and second direction, the gearbox comprising: a casing (32;132) defining an enclosure; an output shaft rotating the propeller in the selected one of the first and second directions, the output shaft being partially enclosed in the casing; a mating gear (46;146) driving the output shaft through a gear train, the mating ge ar having a first position within the casing; an input shaft receiving power from a turbine and rotating in the first direction, the input shaft being partially enclosed in the casing; an input pinion (44,144) coupled to the input shaft, the input pinion having a second position within the casing; a plurality of accessory drive gears each adapted to drive one accessory, the plurality of accessory drive gears each having a third position within the casing; a multiple member gear (78;178) rotating in the first direction, each member of the multiple member gear being meshed with at least one of the plurality of accessory drive gears, and the multiple member gear (78;178) having a fourth position within the casing; wherein an interaction exists between the input pinion, mating gear and multiple member gear, selected from the group consisting of a first and second configuration with the first, second, third and fourth positions being the same in the first and second configuration, the first configuration consisting of the input pinion being meshed with the mating gear such that the mating gear rotates in the second direction, and the multiple member gear being meshed with a first idler gear which is meshed with an accessory pinion coupled to the input pinion, the first idler gear and the accessory pinion being located within the casing, and the second configuration consisting of the input pinion being meshed with a second idler gear which is meshed with the mating gear such that the mating gear rotates in the first direction, the second idler gear being located within the casing, and the multiple member gear being coupled to the mating gear; and wherein the selection between the first and second configurations determines the selected one of the first and second directions. a casing (32;132) defining an enclosure; an output shaft rotating the propeller in the selected one of the first and second directions, the output shaft being partially enclosed in the casing; a mating gear (46;146) driving the output shaft through a gear train, the mating ge ar having a first position within the casing; an input shaft receiving power from a turbine and rotating in the first direction, the input shaft being partially enclosed in the casing; an input pinion (44,144) coupled to the input shaft, the input pinion having a second position within the casing; a plurality of accessory drive gears each adapted to drive one accessory, the plurality of accessory drive gears each having a third position within the casing; a multiple member gear (78;178) rotating in the first direction, each member of the multiple member gear being meshed with at least one of the plurality of accessory drive gears, and the multiple member gear (78;178) having a fourth position within the casing; wherein an interaction exists between the input pinion, mating gear and multiple member gear, selected from the group consisting of a first and second configuration with the first, second, third and fourth positions being the same in the first and second configuration, the first configuration consisting of the input pinion being meshed with the mating gear such that the mating gear rotates in the second direction, and the multiple member gear being meshed with a first idler gear which is meshed with an accessory pinion coupled to the input pinion, the first idler gear and the accessory pinion being located within the casing, and the second configuration consisting of the input pinion being meshed with a second idler gear which is meshed with the mating gear such that the mating gear rotates in the first direction, the second idler gear being located within the casing, and the multiple member gear being coupled to the mating gear; and wherein the selection between the first and second configurations determines the selected one of the first and second directions.