Engine Operating CDS

Question 1

How is a No. 1 engine single ECU Channel A failure displayed on the SMD?

Answer 1

Under the legend [ENG 1], “ECU A” is replaced with a red “F” boxed in white and the green “ECU B” is boxed in yellow.

Question 2

What indications are displayed for a No. 2 engine single ECU Channel B failure on the SMD?

Answer 2

No. 2 engine’s Reduction Gearbox (RGB) oil indications (RGB Oil Temperature (RGBOT) and RGB Oil Pressure (RGBOP)) fall to zero and display a red “F” on the SPS window.

Question 3

What indications are displayed for an engine single ECU Channel A failure on the SMD?

Answer 3

The affected engine’s oil indications (Engine Oil Temperature (EOT) and Engine Oil Pressure (EOP)) on the SPS window fall to zero and display a red “F.”

Question 4

What are the three primary engine parameters used for normal load sharing by the engine control system?

Answer 4

1. Torque (TRQ)
2. Power Turbine Inlet Temperature (PTIT)
3. Gas Generator speed (NG)