TH-73A Systems Practice Test

These questions are part of the practice quiz. Start practicing

• In what situation must the pitot heat be activated on a TH-73?
• What malfunction would likely lead to fluctuating N1 readings in the TH-73A?
• What type of functions are primarily concerned with rate dampening and stabilization, without moving the flight controls?
• The forward engine mount on the bottom side of the engine does what?
• What action should be taken to ensure the ELT system is ready for emergencies?
• How is dissymmetry of lift counteracted in the TH-73A tail rotor system?
• To perform the CVDR preflight functional check, what button should be pressed for how many seconds?
• What occurs in the combustion chamber regarding the airflow?
• How is the rotor brake lever connected to the hydraulic pump in the TH-73A?
• What qualifies as "visible moisture"?
• The two engine chip detectors detect _______ metal particles within the oil system.
• How many chip detectors are present in the tail rotor gearbox?
• Which system is integrated with the pitot heat in the TH-73 for safety during harsh weather?
• Does the engine incorporate an annular combustion chamber, single-stage compressor turbine, and single-stage power turbine?
• Which part of the PFD contains Navigation data?
• If the ELT is accidentally activated, how can it be manually reset?
• What does the alternate static source switch provide an alternate source of static pressure to?
• To which component are the hydraulic pumps mounted?
• What feature does the TH-73A tail rotor utilize to manage dissymmetry of lift?
• Where is the ESIS located in the TH-73A?
• What is the first indicator of an impending engine failure?
• What is a significant concern if the fuel transfer pump fails?
• Which alarm indicates a critical failure within the engine system?
• Which system aids in hands-free flying for the TH-73A helicopter?
• What feature do the TH-73A's cockpit seats have?
• Where is the pitot-static probe installed on the TH-73A helicopter?
• In what mode can the MFD replicate the PFD information?
• Which hydraulic system powers the tail rotor servo actuator?
• What position should the ELT switch normally be set to?
• Is the Freewheeling unit located in the engine accessory gearbox (AGB) section?
• The lower vent system provides fresh air for what purpose?
• True or False: The rotor brake system consists of a two position control lever.
• What component provides stabilization for the yaw control of the helicopter?
• What engine powers the TH-73A helicopter?
• The upper case (bell housing) serves as the _____ for the transmission oil system.
• What is the voltage supply for the pitot heat heating elements in a TH-73?
• How does the reduction gearbox affect the main driveshaft's RPM?
• What should a pilot do before entering a forecast of visible moisture?
• The taxi and landing lights are controlled by what component?
• What functions actively maintain helicopter parameters, such as airspeed and altitude?
• The TH-73A incorporates a _____ DC system and a _______ AC system.
• Do the anti-torque pedals utilize a fly by wire design?
• Does the EXT PWR ON caution indicate that the helicopter is receiving 28VDC power from an external source?
• What is the primary function of the heating system in the TH-73?
• At what fuel weight does the FUEL LOW caution message illuminate?
• What must illuminate when performing the CVDR preflight functional check?
• What would indicate a failure in the ignition system during engine start?
• The heating system mixes fresh ambient air with hot air from which system?
• What happens to the engine if fuel is prevented from entering during start?
• How does the pitot heat system receive its power for operation?
• What effect does increasing collective pitch have on rotor blades?
• How many ignitors does the engine ignition system utilize?
• What indicates the operational readiness of the landing light according to systems checks?
• True or False: All engine chip detectors contain a burn off feature.
• What happens if both inverters fail in the TH-73A?
• True or False: Thomas couplings are comprised of flexible, stacked stainless steel discs on both ends to provide flexibility and maintain driveshaft alignment.
• What malfunction is indicated by no rise in ITT or N1 within ten seconds of rotating the twist grip to IDLE?
• The engine oil lubrication system consists of ____ gear type pressure pump(s) and _____ gear type engine oil scavenge pump(s).
• In the normal start sequence when the starter push button is depressed, the starter will drive:
• What are the three sections of the transmission?
• What does the ELT emit when experiencing a velocity change of 3.5 fps or a sustained force of 30 G or more?
• What is essential for the effective operation of the hydraulic system in helicopters like the TH-73A?
• How many stages does the TH-73's compressor section have?
• What action should be taken if the fuel pressure drops below the normal range?
• What measure is taken to ensure the artificial feel in the Force Trim Actuators?
• What is used within each fuel cell to prevent fuel from shifting during flight?
• What do AHRS 1 and AHRS 2 provide?
• How many cockpit seats are equipped in the TH-73A?
• What is a primary function of the chip detectors within the transmission oil system?
• Which of the following is NOT a function of the ELT?
• In which direction is the landing light angled?
• What is the primary purpose of the tail rotor?
• What is the main rotor diameter of the TH-73A?
• What is the primary function of the swashplate in a helicopter rotor system?
• What type of motion does the TH-73A rotor head design allow for?
• What must a pilot do to acknowledge a blinking warning or caution message?
• How many chip detectors does the TH-73's engine contain?
• The TH-73 has which of the following functionalities?
• The Crew Alerting System (CAS) messages consist of which of the following?
• What is the degree change in direction provided by the tail rotor gearbox?
• What component allows the main driveshaft to spin independently of the engine output shaft?
• What can cause an engine failure in the TH-73A?
• True or False: The purpose of the swashplate is to convert linear flight control commands into rotational control input for main rotor pitch control of the blades.
• True or False: The yaw linear actuator is dedicated to the HELIPILOT 2 computer.
• Which component would be responsible for the manual activation of the emergency locator transmitter?
• Which component of the TH-73A system is affected by cyclic control inputs?
• The heating elements of the pitot heat are powered by which of the following?
• What does CAS stand for in the context of helicopter systems?
• The starter motor will automatically drop out at ______.
• Is the combustion section's primary goal to mix fuel and air efficiently before ignition?
• Which variable indicates a compressor stall in the TH-73A?
• What component provides the mechanical advantage for the tail rotor gearbox in the TH-73A?
• Is it possible to have simultaneous VHF and UHF transmissions for the same transceiver?
• The engine combustion section contains multiple components. How many fuel nozzles does it include?
• What type of fluid does the rotor brake system utilize in its operation?
• If the ITT rises more slowly than normal and the gas generator turbine speed (N1) stabilizes lower than normal, should you abort the start?
• When the ignition switch is in the auto position, at what N1 percentage will the starter automatically disengage?
• The main transmission case (RGB) is a ___-stage reduction gear box.
• Which mode of operation provides short-term attitude stabilization to reduce pilot workload?
• How many chip detectors are included in the transmission oil system?
• How many sprags are contained in the freewheeling unit's clutch?
• How is the TH-73A's main rotor assembly categorized?
• What is the function of the tail rotor gearbox in the TH-73A system?
• What type of ports does the pitot-static probe include?
• Which of the following is NOT a mode of operation for engine fuel control?
• How does the pilot open the IBF bypass door?
• What is the correct response when the FUEL LOW caution message illuminates regarding fuel management?
• Which component of the Force Trim Actuators provides artificial feel when the flight controls are moved?
• The rotor brake must only be operated below which of the following limits?
• True or False: In the event the IBF becomes clogged in flight, the bypass door will open automatically.
• The PT6B-37A engine is classified as what type of design?
• Which component integrates all pilot control inputs from the cyclic and collective to provide output to the main servo actuators?
• Which of the following systems is NOT powered by the AC system?
• Does the external communication system include UHF antennas?
• The central display system integrates all helicopter data for display on how many display units (DU)?
• What can the MFD do in the event of a PFD failure or malfunction?
• How are messages displayed in the CAS list?
• What does the illumination of the FIRE DET caution message indicate?
• In which console can you find the PFDs, MFDs, and ESIS?
• How many tail rotor blades does the TH-73A have?
• The TH-73A main rotor assembly features what type of inertia rotor head?
• How many main rotor tandem servo actuators are present?
• Approximately how many minutes of flight time at MCP do you have when the FUEL LOW caution message illuminates?
• How many NAV/COM transceivers does the TH-73A external communication system include?
• What effect does the centrifugal impeller have on engine airflow?
• Under normal operation, which hydraulic system(s) power the main rotor servo actuators?
• How many VHF antennas are included in the TH-73A external communication system?
• What is the operating frequency of the TH-73A's AC system?
• Which of the following modes of operation allows the helicopter to maintain its current attitude indefinitely?
• The creation of what issue could lead to excessive chips in the engine of the TH-73A?
• What is the upper part of each PFD called?
• Each pilot has their own Master Warning Light (MWL) and Master Caution Light (MCL) located where?
• In which part of the transmission system are variable capacitance fuel quantity probes located?
• What is the purpose of the freewheeling unit in the TH-73 engine?
• Raising the collective results in what effect on the swashplate assembly?
• Which type of fire detector system does the TH-73A utilize?
• Source sensing for ITT is generated by which thermocouples located between which components?
• What is the maximum gross weight of the TH-73A for flight?
• What is the operation mode of the pitot heat when the aircraft is in visible moisture?
• Which component is a primary function of the Electronic Standby Instrument System?
• What is the total fuel capacity of the TH-73A's upper fuel cell?
• Which component of the TH-73 is critical for ice protection during flight?
• A pilot should abort a start if the ITT rapidly accelerates through ______ degrees Celsius.
• Do sensing relays monitor AC voltage output and can they affect load transfer during inverter failure?
• Which system must be checked before using the rotor brake?
• Which components are connected by the two section tail rotor driveshaft?
• What does the main driveshaft connect to the input of in the TH-73A system?
• What happens if the pitot heat is not activated while in visible moisture?
• The inlet barrier filter system prevents which type of particles from entering?
• What powers the rotor brake system in the TH-73A?
• What do the anti-torque pedals primarily control?
• What is the primary advantage of the TH-73A's low inertia rotor head design?
• How many blades make up the TH-73A main rotor assembly?
• Which component adjusts flight control trim based on pilot inputs?
• What is the primary function of the pitot heat system in a TH-73?
• Which component of the CVDR stops the recording function if it senses rapid acceleration or high G levels?
• What type of information does the Forward Instrument Panel primarily display?
• True or False: The tail rotor of the TH-73A is a semi-rigid flapping design.
• Will the passenger and/or crew in the back lose ICS communications in BK-UP mode?
• Where is the rotor brake lever located in the TH-73A?
• What is the primary source of DC power during normal operations of the TH-73A?
• Which feature is NOT a characteristic of the TH-73A main rotor?
• What is the purpose of the heating controls located on the overhead console?
• Where are the heating controls located?
• Which component does the cockpit servo switch control on the filter group assembly?
• What is the function of the two parallel rods at the engine mount?
• Which system is primarily responsible for operating the helicopter's flight controls in the event of a hydraulic failure?
• Which of the following best describes the PT6B-37A engine type?
• Which component is responsible for augmenting fuel flow to the engine during high demand?
• What must occur any time a TH-73 enters visible moisture regarding pitot heat?
• Why should the pilot turn the twist grip to OFF during a start abort?
• True or False: The transmission Accessory Gear Box serves as the reservoir for the transmission oil system.
• What is the primary function of the TH-73A fuel transfer pump?
• Is each pitot tube equipped with an integral heating element that receives power from the 28 VDC bus?
• Which of the following are capable of powering the TH-73A in flight?
• What precaution should be taken when operating in visible moisture?
• Is N2 Speed measured by an electronic speed sensor in the engine RGB?
• True or False: The ESIS has no backup battery, either internal or external.
• What does the air distribution system in the TH-73 consist of?
• What is the purpose of the fire detection system in the TH-73A?
• How does the rotor brake system affect the rotor blades post-engine shutdown?
• What is the main purpose of the rotor brake?
• What is the primary purpose of the AC system in the TH-73A?
• The air conditioner compressor will be inoperative when which of the following is the primary power source?
• Cyclic inputs primarily control which axis of movement in the helicopter?
• How does the pitot heat system contribute to flight safety?
• How many helipilot computers are installed in the TH-73A?
• What happens when the engine's airflow is not adequately managed within the combustion chamber?
• How many AC inverters does the TH-73A have?
• What mechanism typically helps dampen the pitch response during flight?
• The helicopter's air distribution system contains what?
• Which direction does the TH-73A's main rotor spin?
• Which system does the TH-73 utilize for both navigation and communication?
• What mode of operation maintains long-term stabilization of the helicopter's attitude?
• Which mode allows for manual control of engine power settings?
• What is the primary purpose of the AFCS in the TH-73A?
• Which component does the power turbine indirectly affect within the TH-73?
• When does the X-FER PUMP caution message turn on in the TH-73A?
• What is the fuel capacity configuration of the TH-73A?
• Which component is responsible for oil pressure sensing in the TH-73A?
• How many variable capacitance fuel quantity probes are located in the upper and lower cells?
• In the case of a No.1 inverter failure, will the No.2 inverter power the AC bus bars?
• What is the normal engine control mode setting when the TH-73A is in flight?
• True or False: The landing light system consists of a landing light and taxi light, installed under the cockpit just forward of the cross tube.
• What is essential to monitor to ensure optimal engine performance in the TH-73A?
• The Electronic Standby Instrument System (ESIS) provides which information?
• Which component acts as the engine oil reservoir?
• What does the freewheeling unit contain to facilitate its function?
• The TH-73 navigation capability includes which of the following?
• What is the primary function of the engine RGB?
• What is one characteristic of the combustion liner in the engine?
• What is the function of having two independent hydraulic systems?
• What is the main purpose of the transmission reduction gearbox?
• Which component is primarily responsible for changing the direction of drive in the TH-73A transmission?
• What drives the engine accessory gearbox?