The static_thrust, is entry in the aircraft.cfg for the engine power. Aircraft in FSX can have a maximum of four engines.

Captain Sim have the setting at 30000 (30000 / 2 = 15000) so that equates to 15000 lbs of thrust for each engine. See the bold lettering below.

[TurbineEngineData]
fuel_flow_gain          = 0.002                 //Gain on fuel flow
inlet_area              = 17.0                  //Square Feet, engine nacelle inlet area
rated_N2_rpm            = 29920                 //RPM, second stage compressor rated value
static_thrust           = 30000                        //Lbs, max rated static thrust at Sea Level
afterburner_available   = 0                     //Afterburner available?
reverser_available      = 0                     //Thrust reverser available?
ThrustSpecificFuelConsumption = 0.40

According to Wikipedia (I know it isn't the best source of information, but it will do): Powerplant: 8× Pratt & Whitney TF33-P-3/103 turbofans, 17,000 lbf (76 kN) each. So you can see that Captain Sim have set each of the engines at less power.

Captain Sim could provide a more detailed answer than mine. Let's hope they do.

Mark