AVIONIC GENERAL TEST EQUIPMENT

Question 1

In most aviation maintenance operations, electronic troubleshooting and repair of BITE displays are selected on the ____________. These are typically located on the flight deck and in the avionics compartment.

Answer 1

central maintenance computer Control Display Units (CDU’s)

Question 2

An automatic _________ sends BITE maintenance data to the ground maintenance station while the aircraft is en-route.

Answer 2

Aircraft Communications Addressing and Reporting System (ACARS)

Question 3

While in flight, a fault initiates a BITE recording of parameters that is later displayed to the technician when accessing the BITE on the ground. The _________ of BITE is accessible only when the aircraft is on the ground.

Answer 3

maintenance function

Question 4

A _______ provides a known signal or stimulus which is then processed by the tested unit

Answer 4

generator

Question 5

________, is used to determine whether the output of the unit is within design tolerances.

Answer 5

analyzer

Question 6

An _______ measures variations of a parameter as a function of time and displays them graphically on a screen. Typically, they measure voltage and other parameters obtained by processing the voltage signal.
Since _______ include the time domain, they are useful in indicating rapid variations such as AC voltages, pulses, spikes and complex waveforms. They are primarily used in bench testing of equipment and rarely used on the actual aircraft

Answer 6

oscilloscope

Question 7

A _____ is often used to check for standing waves in transmission lines. The unit is similar in appearance to an oscilloscope. The indication provided by the trace signal displays an open or short and provides the distance along the transmission line where the open or short occurs as read from the graticule

Answer 7

TIME DOMAIN REFLECTOMETER (TDR)

Question 8

The ____ performs the same function and provides the same information as the TDR. The advantage of _____ technology for the technician is ease of use, greater precision and portability. _____ do not interfere with digital circuits and the aircraft circuits do not affect the diagnostic equipment readings.

Answer 8

SPREAD SPECTRUM TIME DOMAIN REFECTOMETER (SSTDR)

Question 9

Typical instrumentation on pitot-static test equipment includes an ______

Answer 9

altimeter, vertical speed indicator, and airspeed indicators.

Question 10

Computer based ________ is built to interface with and test the enormous variety of avionics found on a modern aircraft.

Answer 10

Automatic Test Equipment (ATE)

Question 11

VXI stands for

Answer 11

VME bus expansion for instrumentation

Question 12

_________ is a connector system for avionics that uses European plug-in card architecture

Answer 12

Versa Model Eurocard (VME)

Question 13

_______ is a standardized system shared by any manufacturers that wish to produce components for the architecture. It is a fast system that can test components that are plugged in automatically through the computer’s software or with a human interface.

Answer 13

VXI

Question 14

Test equipment calibration standards must be derived from and traceable to one of the following:

Answer 14

1. The National Institute of Standards and Technology.
2. Standards established by the test equipment manufacturer.
3. If foreign-manufactured test equipment, the standards of the country where it was manufactured.

Question 15

To interrogate the Central Maintenance Computer (CMC) or conduct a BITE check of a system, the technician selects from the menu in the CDU. There are large buttons next to the CDU display screen, each button is known as a ___________.

Answer 15

Line Select Key (LSK

Question 16

The _________ typically plugs into where an LRU is removed so that incoming signals to the LRU can be evaluated. Signals may also be dispatched by the analyzer to determine effective interface between various components. A -__________ may also access the bus through a made-for-testing plug-in location.
Most analyzers will have a record mode of operation to capture data and display it numerically or graphically

Answer 16

data bus analyze

Question 17

Avionics test equipment can be classified into two categories:

Answer 17

shop test equipment and portable test equipment.