Cross engine coordination during gas turbine engine motoring

A system of an aircraft, the system comprising:

• a compressed air source operable to supply compressed air;
• a first engine system comprising a first gas turbine engine, a first air turbine starter, a first starter air valve, and a first controller operable to command the first starter air valve to control delivery of the compressed air to the first air turbine starter during motoring of the first gas turbine engine;
• a second engine system comprising a second gas turbine engine, a second air turbine starter, a second starter air valve, and a second controller operable to command the second starter air valve to control delivery of the compressed air to the second air turbine starter during motoring of the second gas turbine engine;
• and
• a communication bus operable to establish communication of cross engine data between the first controller and the second controller, wherein the first controller is operable to command an adjustment to the first engine system based on the cross engine data from the second controller, and the second controller is operable to command an adjustment to the second engine system based on the cross engine data from the first controller.

A method for cross engine coordination during gas turbine engine motoring, the method comprising:

• commanding, by a controller, a first starter air valve to control delivery of compressed air to a first air turbine starter during motoring of a first gas turbine engine of a first engine system;
• monitoring, by the controller, cross engine data of a second gas turbine engine of a second engine system to detect a present condition or a commanded action that modifies an aspect of the compressed air received at the first starter air valve;
• and
• commanding an adjustment to the first engine system to compensate for the modified aspect of the compressed air based on the cross engine data.