Control of multiple flight control surface systems using single power drive unit

A method of assembling a secondary flight control system comprising:

• installing a first flight control surface system onto a wing of an aircraft;
• installing a second flight control surface system onto the wing of an aircraft;
• and
• operably connecting a power distribution unit to the first flight control surface system and the second flight control surface system, wherein the power distribution unit is configured to generate torque to actuate the first flight control surface system and the second flight control surface system,
• wherein the first flight control surface system is a slat system including one or more slats,
• wherein the second flight control surface system is a flap system including one or more flaps,
• wherein the operably connecting a power distribution unit to the first flight control surface system and the second flight control surface system further comprises:
• operably connecting a T-gearbox to the power distribution unit;
• operably connecting the T-gearbox to the slat system;
• and
• operably connecting the T-gearbox to the flap system,
• wherein the T-gearbox is configured to split the torque from the power distribution unit into a first drive line towards the slat system and a second drive line towards the flap system,
• wherein the operably connecting the T-gearbox to the first flight control surface system further comprises,
• operably connecting a first clutch to the first flight control surface system;
• operably connecting the first clutch to the T-gearbox, wherein the first clutch is configured to engage and disengage the first flight control surface system from the T-gearbox and wherein the first clutch is located in the first drive line;
• operably connecting a second clutch to the second flight control surface system, and
• operably connecting the second clutch to the T-gearbox, wherein the second clutch is configured to engage and disengage the second flight control surface system from the T-gearbox, wherein the second clutch is located in the second drive line,
• wherein the second clutch operates independently of the first clutch.

A method of actuating one or more flight control surface systems for an aircraft, the method comprising:

• generating torque using a power distribution unit;
• splitting, using a T-gearbox, the torque generated from the power distribution unit into a first drive line towards a first flight control surface system and a second drive line towards a second flight control surface system;
• and
• actuating at least one of the first flight control surface system and the second flight control surface system using the torque generated form the power distribution unit,
• wherein the first flight control surface system is a slat system including one or more slats,
• wherein the second flight control surface system is a flap system including one or more flaps,
• wherein the T-gearbox is configured to split the torque from the power distribution unit into the first drive line towards the slat system and the second drive line towards the flap system,
• wherein the splitting further comprises:
• engaging and disengaging the first flight control surface system and the T-gearbox in the first drive line with a first clutch;
• and
• independent of the first clutch, engaging and disengaging the second flight control surface with a second clutch.