DQs_deck Flashcards
What are the definitions of WARNINGS, CAUTIONS, and NOTES in the operator’s manual?
Warning - an operating procedure, practice, condition or statement, which if not correctly followed, could result in personal injury or loss of life.Caution - An operating procedure, practice, etc., which if not strictly observed, could result in damage to or destruction of equipment.Note - An operating procedure, condition, etc., which is essential to highlight.
Where does the APU get its fuel?
Fuel is delivered to the APU from the left main tank and to the heater from the right main tank.
Where is the APU ESU located and what does it do?
An APU Electronic Sequencing Unit (ESU) or Digital Electronic Sequencing Unit (DESU), which monitors APU operation, is on the left side of the cabin above the ramp. The ESU/DESU is also labeled APU Control Box.
What is the difference between angle of incidence and angle of attack?
AOI - is the angle between the chord line of a main or tail rotor blade and the rotational relative wind of the rotor system (tip-path-plane). It is a mechanical angle rather than an aerodynamic angle and is sometimes referred to as blade pitch angle.AOA - is the angle between the airfoil chord line and resultant relative wind. AOA is an aerodynamic angle. It can change with no change in AOI.
How is dissymmetry of lift compensated for in a tandem rotor helicopter with a fully articulated rotor system?
Dissymmetry of lift is the differential (unequal) lift between advancing and retreating halves of the rotor disk caused by the different wind flow velocity across each half.In tandem rotor helicopters, the aviator does not manually compensate for dissymmetry of lift when applying forward cyclic. Automatic cyclic feathering systems are installed on tandem rotor helicopters. These systems are activated through computer generated commands at specified airspeeds, usually starting around 70 knots. At low airspeeds, blade flapping compensates for dissymmetry of lift. As airspeed increases, these systems program allowing a more level fuselage attitude and reduce stresses on the rotor driving mechanisms. If the cyclic feathering system fails to properly feather the rotor system at higher airspeeds, greater blade flapping angles and nose low flight attitudes occur and induce increased stresses on the rotor driving mechanisms.
During run-up, prior to engine start, how are the flight control hydraulics pressurized?
The No. 1 system is pressurized by a pump on the forward transmission, and the No. 2 system is pressurized by a pump on the aft transmission. Each flight hydraulic system is connected to a Power Transfer Unit (PTU) (which is part of the Utility Hydraulic system), which allows ground checkout of the flight control systems with the rotors stopped.
Below what pressure altitude will the engine driven fuel pumps draw fuel from the main tanks if both main fuel pumps fail?
6000’ PA
What is the emergency procedure for an ENG1 FUEL PRESS LO or ENG2 FUEL PRESS LO Caution?
Immediate Actions:XFEED Switch - Open (above 6000’ PA)Subsequent ActionsFUEL PUMP(S) Circuit Breakers - Check in.pumps are operational:XFEED Switch - CLOSEpumps are not operational:FUEL PUMP Switch(es) (inoperative pump(s)) - OFF
