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* alt - altitude
* A/P - autopilot
* APU - auxiliary power unit
* ARINC - aeronautical radio incorporated
* A/T - autothrottle
* ATE - automatic test equipment
* BITE - built in test equipment
* CPU - central processor unit
* dc - direct current
* DEU - display electronics unit
* DFDAU - digital flight data acquisition unit
* DFDMU - digital flight data management unit
* DFDR - digital flight data recorder
* DIP - dual inline package
* DME - distance measuring equipment
* DMP - data management processor
* DMU - data management unit
* ECU - electronic control unit
* EE - electronic equipment
* ELEC - electric
* EPROM - erasable programmable read only memory
* EVSC - engine vibration signal conditioner
* FCC - flight control computer
* FDAU - flight data acquisition unit
* FDR - flight data recorder
* FDRS - flight data recorder system
* FMC - flight management computer
* FMCS - flight management computer system
* FSEU - flap slat electronics unit
* GND - ground
* GPWC - ground proximity warning computer
* GSE - ground support equipment
* HF - high frequency
* hyd - hydraulic
* Hz - Hertz
* IDU - interactive display unit
* IFSAU - integrated flight systems accessory unit
* ILS - instrument landing system
* kg - kilogram
FLIGHT DATA RECORDER SYSTEM - INTRODUCTION
EFFECTIVITY
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* lav - lavatory
* LED - light emitting diode
* LRU - line replaceable unit
* MD&T - master dim and test
* MLS - microwave landing system
* MMR - multi mode receiver
* OVHT - overheat
* PCMCIA - personal computer memory card international
association
* PPR - paper
* posn - position
* press - pressure
* pwr - power
* QAR - quick access recorder
* REC - recorder
* RST - reset
* SEL - select
* SRAM - static random access memory
* TCAS - traffic alert and collision avoidance system
* ULD - underwater locating device
* V AC - volts alternating current
* V DC - volts direct current
* VOR - very high frequency omni range
* XFR - transfer
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FLIGHT DATA RECORDER SYSTEM - INTRODUCTION
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EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
The flight data recorder system (FDRS) gets and stores airplane
parameters from airplane systems and sensors. The flight data
recorder (FDR) keeps this data for use during a flight mishap
investigation. The FDR protects the data from heat and water.
The FDR records parameters that are necessary for regulatory
agencies.
The airline can also set additional parameters to record. This
data is stored in the FDRS aircraft conditioning monitoring
system (ACMS).
The FDRS has these components:
* Flight data recorder (FDR)
* Flight data acquisition unit (FDAU)
* FDAU status relay
* Flight recorder test module
* Accelerometer
* Flight control sensors
* Flight surface position transmitters
* System test plug/connector
* Program switch module.
The FDRS uses the printer to print reports and FDRS status.
ACMS data from the FDAU goes through the data loader control
panel to a data loader. The data loader can store data from the
FDAU on a disk. The data loader control panel switch lets you
select the transfer of ACMS data.
You can transfer software from a disk in the data loader to the
FDAU through the data loader control panel.
The control display unit (CDU) controls the ACMS functions in
the FDAU.
The FDRS operates automatically when one of the engines is in
operation or the airplane is in the air. It also operates on the
　
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