Aircraft Engine EPR Measurement Quiz

When airplane weight and runway conditions do not necessitate full takeoff thrust

Flight (high) idle and Ground (low) idle

Engine Pressure Ratio (EPR) Primary Control Mode

<p>Control of the speed of the LP rotor</p> Signup and view all the answers

<p>DND, STD, LTD; DND requires immediate repair, STD requires repair very soon, and LTD requires repair as soon as possible</p> Signup and view all the answers

<p>The PMA is driven by the accessory gearbox and supplies power to the EEC above HP PMA online speed.</p> Signup and view all the answers

<p>The main power levers must be in the idle position for the TR levers to command reverse thrust levels.</p> Signup and view all the answers

<p>The Engine system 1/6 window display contains the primary indicators for controlling engine thrust.</p> Signup and view all the answers

<p>The purpose of the EPR value is for thrust management, as it most accurately measures the internal forces of the engine compressor and turbine stages. However, it is not a true indication of actual engine thrust because it does not measure the propulsive force generated by the LP fan stage air.</p> Signup and view all the answers

<p>To revert from the Alternate (LP) Control Mode to the Primary (EPR) Control Mode, the Hard Reversion must be deselected via the Standby Multifunction Controller (SMC), and the EEC must have all the required resources available. A Soft Reversion must first be followed by a Hard Reversion before a return to the Primary (EPR) Control Mode is possible.</p> Signup and view all the answers

<p>The EEC defaults to the high idle mode during approach if the flaps are set to more than 22, the Weight-On-Wheels (WOW) system is in the air mode, and the anti-skid wheel speed sensors detect wheel rotation less than 53 knots.</p> Signup and view all the answers

<p>The use of reduced takeoff (FLEX) thrust is permissible when airplane weight and runway conditions do not require full takeoff thrust. It reduces wear and maintenance, prolonging engine life by reducing high turbine gas temperatures. FLEX thrust is implemented by using an assumed temperature higher than ambient day temperature, which is entered into the FMS.</p> Signup and view all the answers

<p>LP Speed Transient: 104.3% LP; LP Redline: 102.8% LP; HP Speed Transient: 101.3% HP; HP Redline: 100.0% HP</p> Signup and view all the answers