Power Plant Control System

CHAPTER EIGHT

T-34C AIRCRAFT SYSTEMS FAMILIARIZATION

WORKBOOK

802.

POWER PLANT CONTROL SYSTEM

Power Plant Control Quadrant

The power plant control quadrant, located on the left sidewall of each cockpit, provides control of

engine power output and selection of propeller speed and condition. Three moveable levers, the

outboard PCL, the center condition lever, and the inboard EPL are partially enclosed within a

triangular-shaped housing. The levers in each cockpit are connected by push-pull rods. A friction

lock knob is located on the inside face of the front cockpit quadrant only. A fuel cutoff stop release

lever is located at the rear of both quadrants.

Figure 8-1 Power Plant Control Quadrant

Power Control Lever

The Power Control Lever (PCL) controls engine power output and propeller reverse thrust. The

PCL operates in two ranges: POWER and BETA. The PCL in the front cockpit is connected to

the cam box assembly located on the right side of the accessory gearbox. The cam box assembly

allows the PCL to operate the FCU in the POWER range and the beta valve in the BETA range.

In the POWER range, the PCL controls power from IDLE to MAX. Advancing the PCL

increases fuel flow and power output increases. Retarding the PCL decreases fuel flow and

power output decreases. Retarding the PCL aft to the IDLE position sets idle engine speed of

62-65% N1.

8-2 POWER PLANT CONTROL SYSTEM